WO2020176913A1 - Procédé et dispositif de fabrication d'au moins un élément structural métallique - Google Patents

Procédé et dispositif de fabrication d'au moins un élément structural métallique Download PDF

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Publication number
WO2020176913A1
WO2020176913A1 PCT/AT2020/060001 AT2020060001W WO2020176913A1 WO 2020176913 A1 WO2020176913 A1 WO 2020176913A1 AT 2020060001 W AT2020060001 W AT 2020060001W WO 2020176913 A1 WO2020176913 A1 WO 2020176913A1
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WO
WIPO (PCT)
Prior art keywords
passage
mold
blocking body
component
connecting piece
Prior art date
Application number
PCT/AT2020/060001
Other languages
German (de)
English (en)
Inventor
Christian PLATZER
Original Assignee
Dynamic Metal Systems R & D Gmbh
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 Dynamic Metal Systems R & D Gmbh filed Critical Dynamic Metal Systems R & D Gmbh
Priority to EP20705609.4A priority Critical patent/EP3934835A1/fr
Publication of WO2020176913A1 publication Critical patent/WO2020176913A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • 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
    • B22D17/007—Semi-solid pressure die casting
    • 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
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2023—Nozzles or shot sleeves
    • 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
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2038—Heating, cooling or lubricating the injection unit
    • 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
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2061—Means for forcing the molten metal into the die using screws
    • 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
    • B22D17/2272—Sprue channels
    • B22D17/2281—Sprue channels closure devices therefor
    • 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
    • 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
    • B22D17/32—Controlling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to a method for producing at least one component, wherein flowable metallic material, in particular in the thixotropic state, in a
  • the invention further relates to a device for producing at least one metallic component, having a filling chamber for providing flowable metallic material, in particular in the thixotropic state, a conveying device for the flowable metallic material, at least one connecting piece downstream of the filling chamber, such as a nozzle, and a multi-part mold downstream of the connecting piece, which has at least one cavity for the component to be created, wherein the material for producing the at least one component can be pressed into the at least one cavity of the mold by means of the conveying device from the filling chamber via a passage of the at least one connecting piece the mold for removing the at least one component can be opened after the component has solidified and a plug has formed in the connecting piece, in order to remove the component and to produce a next component after the mold has been closed.
  • a device for producing at least one metallic component having a filling chamber for providing flowable metallic material, in particular in the thixotropic state, a conveying device for the flowable metallic material, at least one connecting piece downstream of the filling chamber
  • near-net-shape components is also the thixomolding process or thixoforming Procedure became known.
  • a metallic material usually a Mg-based alloy, is brought into a thixotropic state in a temperature range between the solidus temperature and the liquidus temperature of the material, in particular under the shear stress of the material, and in this state with a
  • Conveying device usually a screw or a piston, is pressed under pressure from a filling chamber into a cavity of a mold via a nozzle arranged downstream of the filling chamber.
  • a filling chamber into a cavity of a mold via a nozzle arranged downstream of the filling chamber.
  • a preparation, provision and pressing of material in the thixotropic state represents a complex process management, which is particularly important in the manufacture of large-scale components
  • thixotropic material is provided or dosed in a filling chamber in order to then press or inject it into a cavity of a multi-part mold via a nozzle.
  • a preparation of the material to produce a thixotropic state of the material can take place directly in the filling chamber or in an antechamber upstream of the filling chamber, after which the material is transferred to the filling chamber for provision of the material in the filling chamber.
  • Provision of the material in the filling chamber, also referred to as metering includes in particular a suitable one
  • Quantity measurement of the material in the filling chamber in order to press a quantity of material into the mold that is matched to the mass of the component to be produced. This is often achieved with a conveyor device arranged in the filling chamber, which is designed as a screw or piston, the conveyor device being positioned in such a way that a suitable amount of the material is arranged in front of the conveyor device, and finally, after the material has been provided, the material through a axial
  • the multi-part shape is usually formed with a first immovable plate and a second movable plate, with surfaces of the plates in
  • Combination with each other have a negative shape of the component to be created.
  • the mold is closed in the corresponding cavity.
  • the nozzle connects to the first plate or is arranged integrated in it. After pressing the material through the nozzle into the cavity, the material solidifies due to the high thermal capacity of the plates very quickly, with the formation of a plug of solidifying material in the nozzle.
  • the formation of the plug is also desired and intended, since the plug represents an obstacle for flowable material downstream of the plug, so that after the mold has been opened and the component has been removed, the plug prevents material from flowing through the nozzle into the opened mold; the plug is im
  • the flowable material intended for the production of the next component is provided in the filling chamber at the same time as the material is allowed to solidify in the mold. This is also useful because the preparation of the material in the filling chamber cannot be carried out when the mold is open, since the plug formed in the nozzle generally does not withstand a pressure increase associated with the preparation of the material, so that material from the nozzle into the open form would leak.
  • the mold is opened by moving back the movable second plate, the component is removed and the mold is cleaned and a release agent is applied so that the next component created in the next cycle can easily be removed from the mold. The mold is then closed again, after which the next component can be created by pressing the material provided in the filling chamber through the nozzle into the mold.
  • the object of the invention is to provide a method of the type mentioned at the outset with which a component can be produced with a short cycle time or production time and with high component quality.
  • Another aim is to specify a device of the type mentioned at the beginning with which a component can be produced with a short cycle time or production time and with a high component quality.
  • the object is achieved according to the invention by a method of the type mentioned at the outset when a flowable material provided for creating the next component is provided in the filling chamber with the mold open, the passage being at least partially closed with a blocking device, so that while the for the creation of the next component provided material in the filling chamber, the passage of the connector is closed to a To prevent material leakage from the connecting piece in the direction of the open mold while the material is being provided in the filling chamber.
  • a dosing time i.e. the time required to provide the material in the filling chamber, in particular with suitable quantity measurement and, if necessary, suitable preparation of the material compared to a time for the material to solidify in the mold is short, when more viscous materials are used, for example materials in the thixotropic state, and / or when the process is more complex, the time for solidification approaches or exceeds this.
  • a time for providing the material or metering the material in the filling chamber can be a multiple of the time required for the material to solidify in the mold be; a provision time is often exponentially extended
  • the mold can therefore only be opened when a process of providing or metering the material for the next component in the filling chamber has been completed. This is a time of solidification in the form or a
  • Duration of stay of the formed component in the form of the length of time for the Provision of the material in the filling chamber is determined. This leads to an extension of the cycle time, since a component removal from the mold, cleaning of the mold and application of a release agent to the mold can only be carried out after the mold has been opened.
  • a long period of time for the provision of the material in the filling chamber is not only associated with an extended cycle time, but also much more seriously with losses in terms of the quality of a component produced, especially if the component has a large mass and / or complex shape is formed. If a component remains in the mold for a long time or solidifies, the component is cooled to a disadvantageously low temperature, with the component being exposed to high stresses due to its material shrinkage with simultaneous geometric inclusion of the component in the mold, which in particular can lead to hot cracks in the component . This can significantly reduce the quality of the component.
  • a solidification period of the component in the form is decoupled from a period for providing the material in the filling chamber and the component can become one for a quality of the Component favorable time can be removed from the mold.
  • a material leakage from the connecting piece in the direction of the open mold or into the open mold is prevented by the fact that the passage of the connecting piece with the blocking device is at least partially, in particular completely, closed while the material is being provided in the filling chamber.
  • a partial closure of the passage with the blocking device is often sufficient to prevent material from escaping from the connecting piece in the direction of the open mold, especially since the plug allows material to flow through already complicates the passage to a certain extent, although the plug alone is usually not stable enough to block a passage for a longer period of time and thus prevent material from escaping from the connecting piece while the material is being provided in the filling chamber.
  • the passage with the blocking device is completely closed. It is useful if the passage with the blocking device before the start of the provision of the material in the Filling chamber closed and, in particular, after the material has been made available in the filling chamber, preferably before the mold is closed, reopened.
  • Provision of the material in the filling chamber also known as metering, denotes in the context of the invention a preparation of the material, in particular with suitable quantity measurement of the material and / or preparation of the material in the
  • the appropriate amount of material is measured in the filling chamber in order to press an amount of material into the mold that is matched to the mass of the component to be produced.
  • the material is processed to convert and / or maintain the material in a material state provided for pressing into the mold, for example a thixotropic material state.
  • closing the passage with the blocking device within the scope of the invention includes the possibility of removing material to a certain practicable extent, as is customary for a person skilled in the art of metal casting, in particular in the field of thixomolding casting Practice is to overcome the blocking device or its closure and / or from the
  • Connector emerges in the direction of the open form.
  • Connection piece is closed with the blocking device downstream after the plug.
  • the plug is less stressed when the passage is closed or the passage is opened with the blocking device, so that even after the passage has been opened with the blocking device, a sufficiently stable plug remains to prevent material from escaping from the connector after the material has been provided in the filling chamber to guarantee.
  • the blocking device has a blocking body which is used for at least partial, in particular complete, closing of the
  • Passage preferably in a fixed position, is arranged on and / or in the passage, so that the blocking body represents an obstacle for a material guided through the passage in order to prevent material from escaping from the connecting piece in the direction of the open mold.
  • the blocking body expediently has a size and / or shape so that the blocking body in a closed position, in which the blocking body closes the passage, prevents material from flowing through the passage at least partially, in particular completely.
  • Arranging the blocking element on and / or in the passage can be carried out easily if the blocking body is at least partially, in particular completely, inserted into the passage through an opening in the passage in order to close the passage. This is practically achieved if the blocking body, when the mold is open, is at least partially, in particular completely, inserted into the passage from the side of the open mold in order to close the passage. This is the
  • Passage can be blocked in an easy-to-use manner and can in particular be opened again simply by pulling the blocking body out of the passage.
  • a resilient closure is achieved when the blocking element is inserted into an opening of the passage in the direction of insertion, forming a form fit.
  • Outer surface of the blocking body at least in sections as a surface of rotation, in particular with an axis of rotation in the direction of an insertion direction of the
  • Blocking body is formed.
  • an outer surface of the blocking body is essentially conical, at least in sections, in particular as the outer surface of a cone or a truncated cone.
  • Connection piece or a surface forming the passage is in contact, at least in sections as a surface of rotation, in particular with a rotation axis in the direction of a longitudinal axis of the passage. It is preferably provided that the contact surface is essentially conical, at least in sections, in particular as a lateral surface of a truncated cone.
  • the blocking body is arranged on and / or in the passage in such a way that the blocking body touches the plug. This will make the wad during the provision of the material in the filling chamber, the plug usually being exposed to pressure fluctuations and / or vibrations, stabilized by the blocking body. This is efficiently implemented if the blocking body is flat, in particular essentially orthogonal to an insertion direction of the
  • Blocking body aligned has end face, so that in a closed position, the blocking body touching plug rests on the end face.
  • a marked stabilization of the plug can be achieved if the blocking body is arranged on and / or in the passage in such a way that the plug passes through the
  • Blocking body is acted upon by a force, in particular directed upstream. It is favorable if the blocking body has a spring-loaded movable impact element on a side of the blocking body facing an insertion direction in order to apply a spring force with the impact element to the plug in a closed position in which the blocking body touches a plug.
  • the plug is particularly stabilized because the impact element acts as a damping element, so that pressure loads or force peaks acting on the plug in particular can be damped. It is advantageous if the flat end face of the blocking element is arranged on the impact element.
  • the plug may become too stable, in particular depending on a
  • Blocking body has a, in particular movable, working element on a side of the blocking body facing an insertion direction in order to, in a working position in which the blocking body is arranged in the passage, preferably one
  • the plug can be mechanically loosened or deliberately destabilized, in particular during or before the blocking body is removed from the passage, in order to prevent imposition or imposition.
  • the blocking device or the blocking body has a drive unit, in particular a controllable one, which is connected to the working element in order to operate the working element.
  • the plug can be loosened efficiently when the working element is formed in the working position or
  • the working element is designed to execute a rotational movement in the working position or in the closed position in order to drill into the plug.
  • the working element can expediently be designed in particular as a ram for transmitting impacts to the plug and / or as a drill or drilling device for drilling the plug. It is preferred if the impact element is designed as part of the working element. It is advantageous if the plug with the working element is loosened before the passage with the blocking device is opened, in particular before the blocking body is removed from the passage. This is preferably done when the provision of the material in the filling chamber has ended.
  • the blocking body after the blocking body has been arranged on and / or in the passage, is positively and / or non-positively connected to the
  • Connection piece and / or part of the form is releasably connected. This ensures a fixed position and resilient fixation of the blocking body on or in the passage. It has proven useful if the blocking body is magnetically connected to the connecting piece and / or part of the mold.
  • the multi-part mold is usually formed with several parts, in particular a first immovable part and a second part which is movable relative to the first part, so that the mold can be opened or closed by moving the second part relative to the first part.
  • surfaces of the parts In combination with one another, surfaces of the parts have a negative shape of the component to be produced, so that a cavity corresponding to the component is formed by closing the mold.
  • the connecting element usually adjoins a part of the mold, usually the first part, or is arranged integrated into it, so that in particular the passage extends up to the cavity or opens directly into the cavity.
  • the parts are usually in the form of plates.
  • the connecting piece can be designed to pierce part of the mold, preferably the first part, or with part of the Form, preferably the first part, form a unit.
  • the connecting piece can thus comprise, for example, a nozzle and the first part, so that the passage of the connecting piece opens, preferably directly, into the cavity.
  • the connecting piece is formed with several adjoining or connectable nozzles, in particular a first nozzle being or can be integrated into a first part of the mold and a second nozzle which connects or can be connected to the first nozzle , is connected or can be connected to the filling chamber, so that the passage of the connecting piece extends from the filling chamber to the cavity of the mold.
  • Connecting piece preferably controllable, movable positioning device
  • the blocking body is arranged on and / or in the passage, in particular in a fixed position, in order to close the passage.
  • Positioning device can be part of the blocking device.
  • the blocking body can be connected, in particular rigidly, to the positioning device, or the positioning device can be designed to grip the blocking body and preferably to release it after the blocking body has been arranged on or in the passage.
  • the blocking body with the positioning device is arranged on and / or in the passage from the side of the open mold, it is advantageous if a connection between the blocking body and the positioning device is decoupled or released after the blocking body is arranged in a fixed position on and / or in the passage becomes.
  • the positioning device can then be moved away from the connecting piece, so that it does not constitute an obstacle to a subsequent cleaning of the mold and / or the application of release agent to the mold.
  • the positioning device can be designed, for example, as a computer-controlled arm in particular, such as a robot arm.
  • the positioning device is arranged on a part of the mold or is formed with a partial element of a part of the mold which, in particular, is movable relative to the part of the mold.
  • the positioning device is arranged on a part of the mold or is formed with a partial element of a part of the mold which, in particular, is movable relative to the part of the mold.
  • Positioning device be formed with a slide of a part of the mold, which is usually movable relative to the part of the mold in order to expose an undercut formed in the molded part when the mold is opened.
  • a plurality of connecting pieces and / or passages can advantageously be provided. It is then expedient if the passages are closed with several blocking devices or blocking bodies, in particular at the same time, around one
  • Simple handling can be achieved if the arrangement or removal of the blocking body on or from the passage with an in particular computer-controlled arm, for example a component removal device, used to remove the component from the mold, or, for example, a release agent application device, used to apply a Release agent.
  • a component removal device used to remove the component from the mold
  • a release agent application device used to apply a Release agent
  • the component is removed from the mold, after which the mold is cleaned, after which the mold with a
  • Release agent is applied to facilitate removal of the next component from the mold, and the mold is then closed to create a next component.
  • the conveying device is usually designed as a piston or screw.
  • a suitably dimensioned amount of material is generally arranged in front of the conveyor device in order to then press it into the at least one cavity of the mold by axially displacing the conveyor device via the at least one passage.
  • the conveying device is designed as a screw, in particular an axially displaceable screw. The material can then be subjected to a shear load with the screw, often with simultaneous application of temperature with a heating device provided for this purpose in order to convert the material into a thixotropic state.
  • Blocking device for example by removing the blocking body from or from the passage, is brought into a position in which a pressing pressure caused by the conveyor is reduced on a material in the passage, so that when the mold is open and the blocking device is in the open state, the pressing pressure on the material in the passage is reduced.
  • the conveying device is moved back axially in order to reduce a pressing pressure on a material in the passage.
  • an open state of the blocking device or an opening of the passage with the blocking device denotes a state or process in which the passage is not closed with the blocking device or a closure of the passage with the blocking device is canceled.
  • Closing or opening of the passage with the blocking device is to be seen in particular independently of a closure of the passage by the plug, so that when or after opening the passage with the blocking device, the passage can still be closed by the plug or is preferably closed.
  • the provision of the material intended for the production of the next component in the filling chamber takes place at the same time as opening the mold, removing the component, cleaning the mold and / or applying release agent to the mold. It is favorable if the provision of the material intended for the production of the next component in the filling chamber takes place at the same time takes place with a component removal from the mold, a cleaning of the mold and / or an application of the mold with release agent.
  • the passage of the connecting piece is opened again with the blocking device after the provision of the material in the filling chamber has ended, usually before closing, preferably during closing, of the mold, for example by removing the blocking body, in particular with the positioning device, from the passage. It is favorable for stability of the plug if, before opening the
  • the conveying device is brought into a position in which a pressure caused by the conveying device is reduced on a material located in the passage.
  • This can expediently be achieved in that the conveying device is axially displaced back in order to reduce a pressing pressure on a material in the passage.
  • Mg-based alloys, Al-based alloys or Mg-Al alloys have proven successful as the metallic material, the metallic material preferably being provided in a thixotropic state or being pressed into the mold.
  • the further aim of the invention is achieved with a device of the type mentioned at the outset, the device being designed in particular to carry out a method according to the invention if a blocking device is provided with which the passage can at least partially, in particular completely, be closed in order to prevent material from emerging to prevent the connecting piece in the direction of the open mold while a flowable material provided for the production of the next component is provided in the filling chamber when the mold is open.
  • a blocking device is provided with which the passage can at least partially, in particular completely, be closed in order to prevent material from emerging to prevent the connecting piece in the direction of the open mold while a flowable material provided for the production of the next component is provided in the filling chamber when the mold is open.
  • the material in the filling chamber can be provided or metered for the next component when the mold is open, so that the provision of the material in the filling chamber can be decoupled from a process of solidifying the component in the mold.
  • a provision of the material in the filling chamber can be carried out simultaneously with removal of the component from the mold, cleaning of the mold and / or application of a release agent to the mold, whereby a cycle time can be reduced.
  • a component can be removed from the mold at a time that is favorable for the quality of the component, so that material defects in the component, caused by stresses in the component material as a result of which shrinkage during solidification of the component with simultaneous geometric inclusion of the component in the mold can be prevented.
  • the connector can have one or more passages. It is then expedient if several blocking devices are provided in order to close the passages.
  • the connecting piece can be formed with one or more nozzles.
  • the connecting piece is usually designed in such a way that the passage or passages preferably open directly into the cavity of the mold.
  • the connecting piece can be integrated into a part of the mold or the
  • Connector include part of the mold.
  • the device according to the invention can be designed in accordance with or analogously to the features, advantages and effects which are described in the context of a method according to the invention for producing a component, in particular above.
  • Blocking device can be closed downstream after a plug formed in the passage when the component solidifies.
  • the passage of the connecting piece along a flow direction through the passage has at least one section with a varying, in particular reduced, cross-sectional diameter, in order to cause plug formation in the section.
  • the passage with the blocking device can be closed downstream after this section.
  • a practicable closure can be achieved if the blocking device a
  • Positioning device is provided, wherein the positioning device is designed, the blocking body, especially when the mold is open, for a
  • the blocking body is a size and shape of the
  • Passage in particular in a passage cross section, preferably exactly
  • the blocking body can be or is at least partially or completely introduced into the passage through an opening in the passage in order to close the passage.
  • the blocking body can be or is at least partially or completely inserted into the passage from the side of the open mold.
  • An efficient closing of the passage is achieved if an outer surface of the blocking body is designed at least in sections as a surface of rotation, in particular with an axis of rotation in the direction of an insertion direction of the blocking element.
  • an insertion direction denotes a direction of the blocking body provided for inserting the blocking element into a passage.
  • the connecting piece and the blocking body are designed in such a way that a contact surface on which the blocking body is in a closed position with the
  • Connecting piece is connected is at least partially designed as a rotational surface.
  • the blocking body is located on a side of the blocking element facing an insertion direction of the blocking element
  • Blocking body has a spring-loaded movable impact element in order to apply a spring force with the impact element to the plug in a closed position in which the blocking body contacts a plug.
  • the blocking body has a, in particular movable, working element on a side of the blocking body facing an insertion direction in order to provide a time-dependent or time-dependent function in a working position in which the blocking body is arranged in the passage, preferably a closed position of the blocking body.
  • the plug can be mechanically loosened or deliberately destabilized, in particular during or before the blocking body is removed from the passage, in order to make it easier to shoot out or press out the plug in a subsequent manufacturing cycle.
  • the blocking body after the blocking body has been arranged on and / or in the passage, can be detached in a form-fitting and / or force-fitting manner with the
  • connection piece and / or a part of the mold can be connected in order to achieve a fixed position fixation of the blocking body on or in the passage. It has proven useful if the blocking body can be magnetically connected to the connecting piece and / or a part of the mold.
  • the blocking body can expediently have a magnet or electromagnet, for example one on an electrical one
  • Energy supply source connected electrical coil, in order to generate a magnetic field with a current flow caused by the energy supply source through the coil.
  • the blocking body in particular with a preferably controllable holding device, is releasably fastened to the positioning device so that the blocking body after the blocking body has been arranged on or in the
  • Passage can be decoupled from the positioning device.
  • the blocking body has a temperature measuring device and / or pressure measuring device in order to measure a temperature or a pressure in the passage measure up.
  • a measured temperature or measured pressure can advantageously flow into a control of the device and / or the blocking device.
  • the blocking body has a temperature control device in order to heat and / or cool an outer surface of the blocking body. In this way, a sealing effect of the blocking body in a closed position of the blocking body on or in the passage can be improved by an in the
  • Closure position with the blocking body in contact with material, for example the plug, is cooled or heated.
  • the stability of the plug can be increased, for example by advantageously cooling the plug with the temperature control device.
  • the temperature control device can be practicable as
  • Heating device and / or cooling device can be formed.
  • the heating device can preferably be designed as an electrical resistance heater or Peltier element heater.
  • a design as a Peltier element heater has preferably proven successful. It is beneficial if the temperature control device
  • FIG. 1 shows a schematic representation of a device for producing a metallic component in a thixomolding process
  • FIGS. 2 to 9 show schematic representations of method steps of a
  • FIG. 10 shows a schematic representation of a time sequence of a method according to the invention.
  • a typical device 1 for producing a metallic component 2 with a thixomolding process is shown.
  • the device 1 usually comprises a container 3 in which the material to be processed is usually stored as granules.
  • the material is expediently conveyed from the container 3 into a filling chamber 4 via a feed conveyor, for example a suction conveyor, wherein in the filling chamber 4, also referred to as a barrel, a conveying device in the form of a screw 5 is arranged.
  • the filling chamber 4 usually has a heater, usually an electrical one
  • Resistance heating with which the material, usually with simultaneous shearing of the material with the screw 5, is converted into a thixotropic state.
  • Downstream of the filling chamber 4 is a connecting piece which is designed with or as a nozzle 6, the nozzle 6 opening downstream into a cavity of a multi-part shape.
  • the multi-part mold is formed with an immovable first plate 8 and a second plate 9, which is movable relative to the second plate 9. Surfaces of the first plate 8 and / or second plate 9 have a
  • Negative shape of the component 2 to be created By placing the first plate 8 and the second plate 9 against one another, the mold is closed and a cavity corresponding to the component 2 is formed.
  • the nozzle 6 adjoins the first plate 8, usually starting from the filling chamber 4, or is arranged integrated into the first plate 8, so that a passage 7 of the nozzle 6 opens directly into the cavity.
  • the nozzle 6 can be designed to pierce the first plate 8 or form a unit with the first plate 8.
  • the material is converted into a thixotropic state or kept in such a state by the screw 5, as well as a suitable amount of material in the thixotropic state, in particular based on the mass of the component 2 to be produced arranged between the screw 5 and the nozzle 6.
  • a subsequent pressing in or injection of the material via the nozzle 6 into the cavity of the mold takes place through an axial
  • FIG. 1 shows a process state after the component 2 has been allowed to solidify in the mold, a plug 10 having been formed in the passage 7 of the nozzle 6.
  • the mold is open, provision being made advantageously that the component 2 produced is removed from the mold with an arm of a robot.
  • the plug 10 formed in the passage 7 prevents material from escaping from the passage 7 into the open mold.
  • the plug 10 is usually pressed or shot into the mold in a next production cycle when material is pressed into the mold for the production of the next component 2.
  • This process state corresponds to a typical process state of the prior art.
  • the plug 10 prevents a material leakage when the mold is opened, but is not stable enough to withstand a greater pressure load, as would occur in a simultaneous process of providing material for the next component 2 in the filling chamber 4, for a longer period of time and safely.
  • Fig. 2 to Fig. 9 show schematic representations of a filling chamber 4, one of these downstream connecting pieces in the form of a nozzle 6 and a form downstream of the nozzle 6, in particular as a section of the device 1 of Fig. 1, in various successive process steps of a process according to the invention .
  • FIG. 2 shows a process state in which the mold is opened after the component 2 has been allowed to solidify.
  • a plug 10 is formed in the nozzle 6, so that when the mold is opened, material is prevented from escaping from the nozzle 6 into the mold.
  • a passage 7 of the nozzle 6 is advantageously closed with a blocking device, which is expediently formed with a blocking body 11, by pulling the blocking body 11 from the side the opened mold is inserted into a passage 7 of the nozzle 6, shown in Fig. 4.
  • the blocking body 11 touches or presses advantageously against the plug 10, whereby it is stabilized against occurring pressure loads.
  • the blocking body 11 advantageously has a size and shape of the passage 7 in a cross section of the
  • Passage 7 has a corresponding size and shape, so that a material flow through the passage 7 or from the passage 7 in the direction of the open mold is prevented. After the passage 7 is closed with the blocking device, a
  • Provision of a material provided for the creation of the next component 2 in the filling chamber 4 has begun and the component 2 is removed from the mold with an arm of a robot at the same time, shown in FIG. 5. Then, in particular, the provision of the material in the Filling chamber 4, the mold cleaned and applied with a release agent, shown in Fig. 6 and Fig. 7. It is favorable if after the completion of the provision of the material for the next component 2 in the filling chamber 4 or before opening of the passage 7 with the
  • Blocking device in particular by removing the blocking body 11 from
  • the screw 5 is brought into a position in which a with the The pressing pressure caused by the screw 5 is reduced to a material located in the passage 7, so that when the mold is open and the blocking device is in the open state, i.e. usually when the blocking body 11 is or is removed from the passage 7, the pressing pressure on the material located in the passage 7 is reduced.
  • the conveying device or screw 5 is axially shifted back in order to reduce a pressing pressure on a material in the passage 7, shown in FIG. 7. Then, after the provision of the material for the next component 2 in the
  • FIG. 9 shows a subsequent process state in which the mold is closed and the creation of the next component 2 can be started by the
  • Screw 5 is moved axially in the direction of the nozzle 6 in order to press the material provided for the next component 2 in the filling chamber 4 via the nozzle 6 into the cavity of the mold.
  • FIG. 10 shows a time sequence of a method according to the invention, which can be carried out in particular with the device 1 shown in FIG. 1, and which can be seen in particular as an extension of the method according to FIGS. 2 to 9 or concretizes it .
  • a preferred method sequence of a method according to the invention is shown over a time axis t.
  • the mold is opened, denoted by B, wherein during and / or after the opening of the mold, the passage 7 of the connector or the nozzle 6 is closed with a blocking device, preferably in the a blocking body 11 is inserted or inserted into the passage 7, denoted by C.
  • a blocking device preferably in the a blocking body 11 is inserted or inserted into the passage 7, denoted by C.
  • a component removal from the mold generally comprises a process of ejecting the component 2 from the mold, wherein the
  • Component 2 with ejector pins which are moved to penetrate the surface relative to a surface of a part of the mold, usually the movable second part of the mold, so that a component 2 resting on the surface of the molded part is pressed out of the mold or at least from the mold by the ejector pins the mold is released, as well as removing the component 2 from the mold with a removal device, for example a robot arm, which grips the component 2 and transports it away.
  • a removal device for example a robot arm
  • the mold is cleaned and / or a release agent is applied to the mold , denoted by F.
  • F a release agent
  • the material provided in the filling chamber 4 is pressed into the mold via the passage 7 to get the next one To produce component 2, denoted by I.
  • the illustrated process sequence thus begins again from the beginning.
  • provision is preferably made that the provision of the material in the filling chamber 4, denoted by E, takes place simultaneously with a component removal from the mold, denoted by D, and a cleaning or application of the mold with release agent, denoted by F, takes place.
  • the component 2 can be removed from the mold at a time that is favorable for the component 2, whereby a high quality of the component 2 produced can be achieved .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'au moins un élément structural (2), un matériau métallique coulant, notamment à l'état thixotrope, étant fourni dans une chambre de remplissage (4) et ensuite pressé sous pression par le biais d'au moins une pièce de liaison montée en aval, comme une buse (6), de la chambre de remplissage (4) par le biais d'au moins un passage (7) de la pièce de liaison dans au moins une cavité d'un moule en plusieurs parties, après quoi l'élément structural (2) est laissé à solidifier dans le moule. Un tampon (10) particulièrement solide se forme dans le passage (7), après quoi le moule est ouvert et l'élément structural (2) est retiré, après quoi le moule est fermé et un élément structural (2) suivant est produit. L'invention vise à fabriquer un élément structural avec un temps de cycle court et une qualité élevée de l'élément structural et se caractérise à cet effet en ce qu'un matériau coulant destiné à la fabrication de l'élément structural suivant (2) est fourni dans la chambre de remplissage (4) lorsque le moule est ouvert, le passage (7) étant au moins partiellement fermé par un dispositif de blocage, de sorte que le passage (7) de la pièce de liaison est fermé pendant une fourniture du matériau destiné à la fabrication de l'élément structural suivant (2) dans la chambre de remplissage (4) afin d'empêcher le matériau de s'échapper de la pièce de liaison en direction du moule ouvert pendant la fourniture du matériau dans la chambre de remplissage (4). L'invention concerne en outre un dispositif (1) pour la fabrication d'au moins un élément structural métallique (2).
PCT/AT2020/060001 2019-03-07 2020-01-02 Procédé et dispositif de fabrication d'au moins un élément structural métallique WO2020176913A1 (fr)

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ATA50180/2019A AT522266A1 (de) 2019-03-07 2019-03-07 Verfahren und Vorrichtung zur Herstellung zumindest eines metallischen Bauteiles
ATA50180/2019 2019-03-07

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Citations (6)

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US5836372A (en) * 1995-09-01 1998-11-17 Takata Corporation Method and apparatus for manufacturing light metal alloy
EP0986444A1 (fr) * 1998-03-31 2000-03-22 Takata Physics International Limited Inc. Procede et appareil de fabrication de pieces metalliques par moulage sous pression fin
DE10039591A1 (de) * 2000-08-12 2002-02-21 Krauss Maffei Kunststofftech Verfahren und Vorrichtung zum Druckgießen von metallischen Formkörpern
DE10039589A1 (de) * 2000-08-12 2002-02-21 Krauss Maffei Kunststofftech Vorrichtung zum Druckgiessen von metallischen Formkörpern
WO2002026426A1 (fr) * 2000-09-27 2002-04-04 Ing. Rauch Fertigungstechnik Gesellschaft M.B.H. Procede de moulage sous pression, ainsi que manchon de remplissage et machine de moulage sous pression associes
DE102008055506A1 (de) * 2008-12-11 2010-06-17 Bühler Druckguss AG Druckgiessverfahren und Vorrichtung zum Druckgiessen

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Publication number Priority date Publication date Assignee Title
ES2262479T3 (es) * 2000-10-31 2006-12-01 Oskar Frech Gmbh + Co. Kg Dispositivo para la fabricacion de piezas de metal moldeadas a presion, en particular de metales no ferreos.
US20070131376A1 (en) * 2005-12-09 2007-06-14 Husky Injection Molding Systems Ltd. Cooling structure of metal-molding system for shot located downstream of blockage
AT515969B1 (de) * 2014-07-03 2019-08-15 Ltc Gmbh Vorrichtung und Verfahren zur Erstellung zumindest eines metallischen Bauteils

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5836372A (en) * 1995-09-01 1998-11-17 Takata Corporation Method and apparatus for manufacturing light metal alloy
EP0986444A1 (fr) * 1998-03-31 2000-03-22 Takata Physics International Limited Inc. Procede et appareil de fabrication de pieces metalliques par moulage sous pression fin
DE10039591A1 (de) * 2000-08-12 2002-02-21 Krauss Maffei Kunststofftech Verfahren und Vorrichtung zum Druckgießen von metallischen Formkörpern
DE10039589A1 (de) * 2000-08-12 2002-02-21 Krauss Maffei Kunststofftech Vorrichtung zum Druckgiessen von metallischen Formkörpern
WO2002026426A1 (fr) * 2000-09-27 2002-04-04 Ing. Rauch Fertigungstechnik Gesellschaft M.B.H. Procede de moulage sous pression, ainsi que manchon de remplissage et machine de moulage sous pression associes
DE102008055506A1 (de) * 2008-12-11 2010-06-17 Bühler Druckguss AG Druckgiessverfahren und Vorrichtung zum Druckgiessen

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EP3934835A1 (fr) 2022-01-12

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