EP3164236A1 - Procédé et dispositif pour couler au moins une pièce - Google Patents

Procédé et dispositif pour couler au moins une pièce

Info

Publication number
EP3164236A1
EP3164236A1 EP15729747.4A EP15729747A EP3164236A1 EP 3164236 A1 EP3164236 A1 EP 3164236A1 EP 15729747 A EP15729747 A EP 15729747A EP 3164236 A1 EP3164236 A1 EP 3164236A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
mold
component
plug
cavity
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.)
Granted
Application number
EP15729747.4A
Other languages
German (de)
English (en)
Other versions
EP3164236B1 (fr
Inventor
Christian PLATZER
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.)
Ltc GmbH
Original Assignee
Ltc 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 Ltc GmbH filed Critical Ltc GmbH
Publication of EP3164236A1 publication Critical patent/EP3164236A1/fr
Application granted granted Critical
Publication of EP3164236B1 publication Critical patent/EP3164236B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B22D17/007—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
    • 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
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
    • B22D21/04—Casting aluminium or magnesium

Definitions

  • the invention relates to a method for casting at least one component, wherein flowable material, in particular magnesium or a magnesium alloy in the thixotropic state, is injected to form the at least one component via at least one nozzle under pressure in a cavity of a multi-part mold, after which the component in the Form is allowed to solidify, with a particular solid plug forms in the nozzle, after which the mold is opened and the at least one component is removed, after which the mold is closed and the next component is created.
  • flowable material in particular magnesium or a magnesium alloy in the thixotropic state
  • the invention relates to a device for casting at least one metallic component with a conveyor for material in the flowable state, in particular magnesium or a magnesium alloy in the thixotropic state, and at least one nozzle with a heater and a multi-part mold, which at least one cavity for has the component for forming the at least one component via the conveyor and the downstream downstream at least one nozzle in the at least one cavity of the mold injectable and the mold for removing the at least one component after solidification of the same is apparent to after creating the Component and closing the mold to start a new build cycle.
  • Magnesium and magnesium-based alloys can in particular by means of
  • the conveyor is usually designed as a screw, which is located in the so-called barrel or held in this.
  • the material is transported by propulsion with the screw to the nozzle, which in turn is integrated in a part of a multi-part mold.
  • the multi-part mold is usually formed in two parts, wherein that part which is opposite to the nozzle-integrating part, one or more cavities for or to be created components.
  • the second part of the mold is slidably mounted, so that the mold for the removal and manufacture of components can be opened and closed repeatedly.
  • thixotropic material is injected at high pressure via the barrel and the nozzle, so that the cavities are completely filled. This is injected in a single point, lead from the lines to be filled to the individual cavities. Once the cavities have been filled, the components can be allowed to solidify. Subsequently, the mold is opened and removed the components, which can then be separated. If only one cavity is present or only one (larger) component to be created, the procedure is analog, wherein the cavity is then filled at several points with the flowable material.
  • the material in the nozzle solidifies due to a heat transfer from the mold tempered below the temperature level of the melt at this stage and the material solidifying in the mold, so that a plug usually forms.
  • This grafting is not only desirable, but also necessary so that magnesium does not escape freely in the region of the nozzle or the sprue point during subsequent opening of the mold and during the subsequent addition of magnesium, which of course is not desired.
  • the plug is ejected by correspondingly high pressure. For this purpose is in the form in the area of the point of attack in many applications a Well provided, which receives the plug and is referred to as a plug catcher.
  • the object of the invention is to provide a method of the type mentioned above and a suitable designed for this device, wherein a component manufacturing can be done under gentler conditions for the device.
  • the procedural object is achieved if, in a method of the type mentioned, the nozzle is heated with the mold open in order to at least soften the plug formed in the nozzle prior to the creation of the next component.
  • An advantage achieved by the invention is to be seen in particular in that although the plug is formed as in the prior art and thus ensures the desired tightness during an opening of the mold, but is already actively heated in this state without loss of sealing effect, so when creating the next component, a back pressure through the plug is much lower than before.
  • a heating power is adjusted at the nozzle so that the plug softens without the entry of material into the cavity.
  • the heat output at the nozzle can then be increased.
  • the plug can be fully melted, because any material can occur in any case only in the closed mold and thus the cavities.
  • a heating power at the nozzle is reduced when the component is allowed to solidify, so that a temperature for plug formation in the nozzle is not reached.
  • Cooling program targeted and variable to the individual steps of a creation cycle including injection, opening the mold and component removal, mold cleaning and release agent and closing the mold for a new injection to be matched.
  • a control for the heater which controls a temperature at or in the nozzle in dependence on the status of the creation cycle variable.
  • the temperature at or in the nozzle can be controlled so that optimal conditions for plug formation prior to opening the mold and plug softening and / or plug dissolution prior to the next injection of material, as described above, result during a build cycle ,
  • any heating elements can be used, which can be controlled accordingly.
  • the heating device a
  • Resistance heating is because an inductive heating of the at least one nozzle, which is ultimately an integral part of a part of a mold, including the required control difficult to implement. With a resistance heater, however, this is possible in a relatively simple manner.
  • the heater may include several separately controllable Wderstandsloomimplantation.
  • the nozzle is preferably formed from a steel, in particular a hot-work tool steel.
  • the temperature in the nozzle which is important, can be controlled very precisely.
  • the heater may be soldered to the at least one nozzle to ensure efficient heat transfer.
  • Figure 1 shows a thixomolding device
  • FIG. 2 shows sequences during a creation cycle
  • Fig. 3 is a schematic representation of the processes in a nozzle during a
  • Fig. 4 is a nozzle.
  • a device 5 which is designed for a thixomolding of components made of magnesium or a magnesium alloy.
  • the device 5 comprises a container 6, in which the material to be processed 1 is kept in stock in granular form. Via a conveying element, such as a suction conveyor, material 1 is conveyed out of the container 6 into a filler neck 7. About the filler neck 7, the material 1 enters a barrel 8, which is provided with a screw with a corresponding drive. The barrel 8 is held at a suitable temperature by a heater, so that the material 1 assumes a thixotropic state or is transported in this state to a downstream downstream nozzle 2.
  • the nozzle 2 is integrated in a first part 9 of a mold.
  • a second part 10 of the mold is opposite the first part 9 of the mold and is horizontally displaceable, so that the mold can be opened, for example, to remove components produced by means of a robot arm 11.
  • the nozzle 2 of the device 5 is subjected to a temperature program that leads to lower pressure peaks in the barrel 8 without lengthening the cycle time and thus significantly increases its service life.
  • the variable temperature control on or in the nozzle 2 is shown in Fig. 3 for a creation cycle.
  • the nozzle 2 is subjected to maximum heating power so that the material 1 can flow freely through the nozzle 2.
  • the heating power can be reduced, as by a changed hatching in the heater. 4 is shown.
  • the plug 3 can in principle be formed in further, but possibly lowered heating of the nozzle 2.
  • the plug 3 breaks off in the region of the nozzle 2, but remains substantially intact. This corresponds to state C.
  • the mold is still open now, but the heater 4 can already operate at higher power to soften the plug 3. This corresponds to the state D.
  • the mold is closed again, can be driven with the heater 4 at full power, so that the plug 3 ideally completely melts. This corresponds to state E.
  • the nozzle 2 is completely free, so that pressure peaks in the barrel 8 are eliminated or at least reduced.
  • the targeted softening and subsequent melting of the plug 3 can be carried out within the usual time for a creation cycle of less than 40 seconds.
  • FIG. 4 shows a construction of a nozzle 2 together with a heating device 4, which is particularly suitable for this purpose.
  • the heating device 4 is designed as WderstandsLiteung, wherein the heater 4 extends in a spiral around the nozzle 2 and is soldered in the outside recesses of the nozzle 2.
  • the nozzle 2 itself is usually made of a steel, in particular a hot-work tool steel.
  • connection of the heater 4 with the nozzle 2 can achieve a rapid heat transfer, which allows compliance with the times of conventional injection operations.
  • the heater 4 can be relatively easily integrated with the nozzle 2 in the first part 9 of the mold.

Landscapes

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

Abstract

L'invention concerne un procédé pour couler au moins une pièce, du matériau métallique coulant (1), en particulier du magnésium ou un alliage de magnésium dans un état thixotropique, étant injecté via au moins une buse (2), sous pression, dans une cavité d'un moule en plusieurs pièces, en vue de la formation de ladite au moins une pièce, suite à quoi on laisse la pièce se solidifier dans le moule, un bouchon (3) particulièrement solide se formant dans la buse (2), le moule étant ensuite ouvert et ladite au moins une pièce étant prélevée, suite à quoi le moule est fermé et la pièce suivante est réalisée. Selon l'invention, la buse (2) est chauffée lorsque le moule est ouvert pour au moins ramollir le bouchon (3) formé dans la buse (2) avant la réalisation de la pièce suivante. En outre, l'invention concerne un dispositif conçu pour la réalisation du procédé.
EP15729747.4A 2014-07-03 2015-05-18 Procédé et dispositif pour couler au moins une pièce Active EP3164236B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50465/2014A AT515970B1 (de) 2014-07-03 2014-07-03 Verfahren und Vorrichtung zum Gießen zumindest eines Bauteils
PCT/AT2015/050126 WO2016000007A1 (fr) 2014-07-03 2015-05-18 Procédé et dispositif pour couler au moins une pièce

Publications (2)

Publication Number Publication Date
EP3164236A1 true EP3164236A1 (fr) 2017-05-10
EP3164236B1 EP3164236B1 (fr) 2021-10-20

Family

ID=53432899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15729747.4A Active EP3164236B1 (fr) 2014-07-03 2015-05-18 Procédé et dispositif pour couler au moins une pièce

Country Status (3)

Country Link
EP (1) EP3164236B1 (fr)
AT (1) AT515970B1 (fr)
WO (1) WO2016000007A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2542875A1 (de) * 1975-09-25 1977-03-31 Siemens Ag Verfahren zum angusslosen spritzen von thermoplastteilen
JP3817786B2 (ja) * 1995-09-01 2006-09-06 Ｔｋｊ株式会社 合金製品の製造方法及び装置
US6840302B1 (en) * 1999-04-21 2005-01-11 Kobe Steel, Ltd. Method and apparatus for injection molding light metal alloy
AUPR076300A0 (en) * 2000-10-13 2000-11-09 Commonwealth Scientific And Industrial Research Organisation Device for high pressure casting
US6938669B2 (en) * 2001-08-30 2005-09-06 Denso Corporation Metal molding method and apparatus
CA2453170C (fr) * 2002-12-20 2012-02-21 Mold-Masters Limited Appareil de moulage par injection a entree laterale
DE102005042867A1 (de) * 2005-09-08 2007-03-22 Bühler Druckguss AG Druckgiessverfahren
DE102006041514B4 (de) * 2006-08-28 2015-02-05 Gerhard Schoch Energiespardüse für eine Warmkammer-Druckgießmaschine
AT512229B1 (de) * 2011-11-10 2014-10-15 Mold Thix Consulting Bueltermann Gmbh Vorrichtung, anlage und verfahren zum druckgiessen von metallischem material im thixotropen zustand
DE102012102549A1 (de) * 2011-11-15 2013-05-16 Ferrofacta Gmbh Druckgussdüse und Verfahren zum Betrieb der Druckgussdüse
DE102012009790A1 (de) * 2012-05-18 2013-11-21 Gebr. Krallmann Gmbh Verfahren zum Spritzgießen einer flüssigen Metall-Komponente und Düse zum SpritzenMetall

Also Published As

Publication number Publication date
AT515970A1 (de) 2016-01-15
WO2016000007A1 (fr) 2016-01-07
EP3164236B1 (fr) 2021-10-20
AT515970B1 (de) 2018-11-15

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