EP1934005B1 - Die casting method - Google Patents
Die casting method Download PDFInfo
- Publication number
- EP1934005B1 EP1934005B1 EP06775167A EP06775167A EP1934005B1 EP 1934005 B1 EP1934005 B1 EP 1934005B1 EP 06775167 A EP06775167 A EP 06775167A EP 06775167 A EP06775167 A EP 06775167A EP 1934005 B1 EP1934005 B1 EP 1934005B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- opening
- die
- plug
- molten metal
- 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.)
- Not-in-force
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Images
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
- B22D17/20—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
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2272—Sprue channels
Definitions
- the invention relates to a die casting method using metal melts, particularly preferably of aluminum, magnesium or zinc materials for the production of die-cast parts.
- the DE-A-4326325 discloses a method for selectively draining a metallurgical vessel.
- the vessel has a drain port in the bottom area, in which a part of the vessel contents is solidified, so that a plug is formed.
- the thus closed drainage nozzle can be opened by causing the plug to melt.
- the discharge nozzle is associated with an induction heater.
- EP-A-1201335 discloses a hot-chamber casting machine including a casting piston 5 with an opening to the mold and having a hot runner system.
- a plug closes an additional mouthpiece between nozzle and sprue and is only intended to prevent backflow from the mold, which requires a separate receiving space.
- a plug is formed far from the casting chamber in an additional mouthpiece between the gate and a heated nozzle.
- the DE-A-10359692 relates to an injection molding device for plastics, wherein a needle is additionally arranged behind a plug which is to remove the plug.
- the DE-A-10039589 includes a separate from the injection unit, mechanical closure element with which a nozzle after injection from the melt is closed.
- a device for the production of metal castings in the low pressure range according to EP-B-1458905 The purpose of the invention is to prevent the backflow of melt from the casting chamber by means of controlled valves, similar to a casting device US-A-3800986 ,
- the invention has for its object to develop a die casting in which a mold-side opening of a casting chamber is closed, this also by the material to be cast itself, an aluminum, magnesium or zinc material so that no mechanically moving closures are required.
- the mold-side opening of the casting chamber to form resp. to the sprue is formed by a material closure.
- This material closure is a plug, which may also be disc-shaped and consists of at least teilerstarrtem material (casting material).
- this plug Before the next shot, this plug is to be at least partially melted, for which purpose the energy of the melt replenished in the casting chamber and / or a heating device is used.
- the grafting can be done in single as well as in multiple cuts.
- the formation of plugs is possible on the entire way to the gate as well as in the gate itself. Multiple grafting or grafting in multiple runners are also possible.
- the casting piston must stop at the current shot in front of the stopper to be formed.
- closure elements there are no mechanically moving closure elements needed and there is no resp. no substantial loss of material, but the closure can be supplemented by mechanically moving or other closure elements, in particular independently acting elements.
- the invention thus relates to a high pressure die casting, but no Thixogiess vide.
- the invention will be described in more detail in exemplary embodiments with reference to a drawing.
- the drawing shows in the Fig. 1 and 2 schematized parts of a die casting machine.
- a die casting machine not fully shown, has a casting chamber 1 with a casting piston 2.
- the casting chamber 1 has a nozzle 3 for docking a dosing tube 5 for dosing from below or alternatively an opening for dosing from above.
- the opening for dosing from above can also be used as a counter hole be used for venting the casting chamber 1 (reduction of counter-pressure waves).
- a casting piston 2 opposite the frontal opening 7 to a sprue of the mold cavity of a mold is completely sealed.
- This seal of the opening 7 is achieved by a plug 4 of the material to be poured.
- This plug is formed by "excess" molten metal by the casting piston 2 is moved so far in the direction of the opening 7 after a filling of the casting chamber 1 that the mold cavity is completely filled with molten metal and a Schmelzerest in the casting chamber 1 in front of the opening 7 remains.
- the plug 4 is at least partially remelted during or before the ancestor of the casting piston 2 by means of a heater 10. If necessary, the heat of the molten metal can also be used. The heating of the melt takes place as shown with an inserted heater 10 or by means of a dome resp. Torpedoes 11, which is arranged as a separate element in the melt channel 13.
- melt supply via a metering valve 12 may be regulated, wherein the melt also passes at the end face of the casting chamber 1 through an inlet opening 9 in this and is pressed by an outlet opening 8 (corresponding to the aforementioned opening 7) of this in the mold and is heated by the torpedo 11.
- a feed line (metering tube 5) of the melt from an oven after filling the casting chamber 1 and before filling the mold cavity by a second plug 4 ' is closed.
- the casting chamber 1 can also consist of a fully effetnitr convinced and powder metallurgy produced material.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
Die Erfindung betrifft ein Druckgiessverfahren unter Verwendung von Metallschmelzen, besonders bevorzugt von Aluminium-, Magnesium- oder Zinkwerkstoffen zur Herstellung von Druckgussteilen.The invention relates to a die casting method using metal melts, particularly preferably of aluminum, magnesium or zinc materials for the production of die-cast parts.
Die Herstellung von Druckgussteilen aus leichtmetallischen Schmelzen heraus ist bekannt. Hierzu wird eine Portion Schmelze in eine Giesskammer gefüllt und mittels eines Giesskolbens in eine Formkavität gepresst.The production of die castings from light metal melts out is known. For this purpose, a portion of melt is filled into a casting chamber and pressed by means of a casting piston into a mold cavity.
Es ist nach der
Die
In der
Die
In der
Die
Eine Vorrichtung zur Herstellung von Metallgussteilen im Niederdruckbereich gemäss
Der Erfindung liegt die Aufgabe zugrunde, ein Druckgiessverfahren zu entwickeln, bei dem eine formseitige Öffnung einer Giesskammer verschliessbar ist, dies auch durch das zu vergiessende Material selbst, ein Aluminium-, Magnesium- oder Zinkwerkstoff so dass keine mechanisch bewegten Verschlüsse erforderlich sind.The invention has for its object to develop a die casting in which a mold-side opening of a casting chamber is closed, this also by the material to be cast itself, an aluminum, magnesium or zinc material so that no mechanically moving closures are required.
Die Lösung der Aufgabe erfolgt mit den Merkmalen des Patentanspruchs. Die formseitige Öffnung der Giesskammer zur Form resp. zum Angusskanal wird durch einen Materialverschluss gebildet. Dieser Materialverschluss ist ein Pfropfen, der auch scheibenförmig sein kann und aus zumindest teilerstarrtem Material (Giesswerkstoff) besteht.The solution of the problem is achieved with the features of the claim. The mold-side opening of the casting chamber to form resp. to the sprue is formed by a material closure. This material closure is a plug, which may also be disc-shaped and consists of at least teilerstarrtem material (casting material).
Vor dem nächsten Schuss ist dieser Pfropfen zumindest partiell aufzuschmelzen, wozu die Energie der in die Giesskammer nachgefüllten Schmelze und/oder einer Heizeinrichtung verwendet wird.Before the next shot, this plug is to be at least partially melted, for which purpose the energy of the melt replenished in the casting chamber and / or a heating device is used.
Die Pfropfbildung kann bei einzelnen wie auch bei Mehrfachanschnitten erfolgen. Die Ausbildung von Pfropfen ist auf dem gesamten Weg zum Anschnitt wie auch im Anschnitt selbst möglich. Mehrfachpfropfen bzw. Pfropfen in mehreren Angusskanälen sind ebenfalls möglich.The grafting can be done in single as well as in multiple cuts. The formation of plugs is possible on the entire way to the gate as well as in the gate itself. Multiple grafting or grafting in multiple runners are also possible.
Der Giesskolben muss beim aktuellen Schuss vor dem zu bildenden Pfropfen stehen bleiben.The casting piston must stop at the current shot in front of the stopper to be formed.
Es werden keine mechanisch bewegten Verschlusselemente benötigt und es entsteht kein resp. kein substantieller Materialverlust, doch kann das Verschliessen durch mechanisch bewegte oder andere Verschlusselemente, insbesondere unabhängig voneinander wirkende Elemente ergänzt werden.There are no mechanically moving closure elements needed and there is no resp. no substantial loss of material, but the closure can be supplemented by mechanically moving or other closure elements, in particular independently acting elements.
Eine Druckgiessmaschine enthält u.a. folgende Funktionsmerkmale:
- ➢ Die Giesskammer weist mindestens einen Kanal zu einer Form (Formkanal) und einen Anschlusskanal zu einem Schmelzeofen auf.
- ➢ Formkanäle können am Formeintritt geschlossen werden und der Anschlusskanal kann geschlossen werden.
- ➢ Formkanäle sind während der Formfüllung offen, der Anschlusskanal ist dabei geschlossen.
- ➢ Formkanäle sind während der Füllung der Giesskammer geschlossen und der Anschlusskanal ist offen.
- ➢ Der Verschluss der Kanäle erfolgt thermisch (Pfropfen) oder ggf. mechanisch.
- ➢ Zwischen Giesskammer und Ventil bleibt der zu giessende Werkstoff flüssig, die Giesskammer ist gekühlt.
- ➢ The casting chamber has at least one channel to a mold (molding channel) and a connection channel to a melting furnace.
- ➢ Form channels can be closed at the mold inlet and the connection channel can be closed.
- ➢ Form channels are open during mold filling, the connection channel is closed.
- ➢ Form channels are closed during the filling of the casting chamber and the connection channel is open.
- ➢ The closure of the channels takes place thermally (grafting) or, if necessary, mechanically.
- ➢ Between the casting chamber and the valve, the material to be cast remains liquid, the casting chamber is cooled.
In weiterer Ausbildung sind noch andere Optionen möglich:
- 1. Schmelzekanal
Zyklisches Kühlen oder Heizen durch aktive oder passive Mittel, z. induktive oder konduktive Heizelemente, Einsätze zur Dämmung u.a. - 2. Schmelzeverteilung
Beheizbare und/oder thermisch isolierte Verteiler - 3. Dosierung vom Schmelzeofen
Induktive und bevorzugt zyklische Heizung, Steuerung der Schmelzeviskosität, Verwendung hochkonduktiver und druckunempfindlicher Werkstoffe - 4. Andocken des Dosierrohres mit beliebigem Winkel zur Achse der Giesskammer
- 5. Erhöhung der Schmelzefliesslänge oder Reduktion des Einpressdruckes, Verringerung der Prozesstemperatur der Schmelze, vollständige Temperatursteuerung vom Schmelzeofen bis zur Form, kürzere Zykluszeiten.
- 1st melt channel
Cyclic cooling or heating by active or passive means, e.g. inductive or conductive heating elements, inserts for insulation, etc. - 2. Melt distribution
Heatable and / or thermally insulated distributors - 3. Dosing from the melting furnace
Inductive and preferably cyclic heating, control of the melt viscosity, use of highly conductive and pressure-insensitive materials - 4. Dock the dosing tube at any angle to the axis of the casting chamber
- 5. Increasing the melt flow length or reducing the injection pressure, reducing the process temperature of the melt, complete temperature control from the melting furnace to the mold, shorter cycle times.
Die Erfindung betrifft somit ein Hochdruck-Druckgiessen, jedoch kein Thixogiessverfahren.The invention thus relates to a high pressure die casting, but no Thixogiessverfahren.
Die Erfindung wird nachfolgend in Ausführungsbeispielen anhand einer Zeichnung näher beschrieben. Die Zeichnung zeigt in den
Eine nicht vollständig dargestellte Druckgiessmaschine weist eine Giesskammer 1 mit einem Giesskolben 2 auf. Die Giesskammer 1 weist einen Stutzen 3 zum Andocken eines Dosierrohres 5 für ein Dosieren von unten oder alternativ eine Öffnung für ein Dosieren von oben auf. Die Öffnung für ein Dosieren von oben kann aber auch als Gegenloch zur Entlüftung der Giesskammer 1 verwendet werden (Abbau von Gegendruckwellen).A die casting machine, not fully shown, has a casting chamber 1 with a
Eine dem Giesskolben 2 gegenüberliegende stirnseitige Öffnung 7 zu einem Angusskanal der Formkavität einer Form ist vollständig abdichtbar.A
Diese Abdichtung der Öffnung 7 wird durch einen Pfropfen 4 aus dem zu vergiessenden Material erreicht. Gebildet wird dieser Pfropfen durch "überschüssige" Metallschmelze, indem der Giesskolben 2 nach einer Füllung der Giesskammer 1 soweit in Richtung der Öffnung 7 verfahren wird, dass die Formkavität vollständig mit Metallschmelze gefüllt wird und ein Schmelzerest in der Giesskammer 1 vor der Öffnung 7 verbleibt. Dieser Schmelzerest erstarrt zumindest teilweise und bildet so den Pfropfen 4. Nach dem Rückfahren des Giesskolbens 2 und der Füllung der Giesskammer 1 für den nächsten Schuss wird der Pfropfen 4 beim oder vor dem Vorfahren des Giesskolbens 2 mittels einer Heizung 10 zumindest teilweise wieder aufgeschmolzen. Ggf, kann auch die Wärme der Metallschmelze mit genutzt werden. Die Heizung der Schmelze erfolgt wie dargestellt mit einer eingefügten Heizung 10 oder mittels eines Doms resp. Torpedos 11, welches als separates Element im Schmelzekanal 13 angeordnet ist.This seal of the opening 7 is achieved by a
In weiterer Ausbildung kann hierbei die Schmelzezufuhr über ein Dosierventil 12 geregelt sein, wobei die Schmelze auch an der Stirnseite der Giesskammer 1 durch eine Eintrittsöffnung 9 in diese gelangt und durch eine Austrittsöffnung 8 (entsprechend der vorgenannten Öffnung 7) von dieser in die Form gepresst wird und dabei durch den Torpedo 11 aufgeheizt wird.In a further embodiment, in this case the melt supply via a
Nach der Ausführungsform wird eine Zuleitung (Dosierrohr 5) der Schmelze von einem Ofen nach dem Füllen der Giesskammer 1 und vor dem Füllen der Formkavität durch einen zweiten Pfropfen 4' verschlossen.According to the embodiment, a feed line (metering tube 5) of the melt from an oven after filling the casting chamber 1 and before filling the mold cavity by a second plug 4 'is closed.
Neben herkömmlichen Werkstoffen kann die Giesskammer 1 auch aus einem voll durchnitrierten und pulvermetallurgisch hergestellten Werkstoff bestehen.In addition to conventional materials, the casting chamber 1 can also consist of a fully durchnitrierten and powder metallurgy produced material.
- 11
- Giesskammercasting chamber
- 22
- Giesskolbencasting piston
- 33
- StutzenSupport
- 44
- PfropfenGraft
- 4'4 '
- PfropfenGraft
- 55
- Dosierrohrdosing
- 77
- Öffnungopening
- 88th
- Austrittsöffnungoutlet opening
- 99
- Eintrittsöffnunginlet opening
- 1010
- Heizungheater
- 1111
- Torpedotorpedo
- 1212
- Dosierventilmetering valve
- 1313
- Schmelzekanalmelt channel
Claims (3)
- Die-casting process, in particular for producing cast parts from metallic materials, in particular aluminium, magnesium or zinc materials, wherein a molten metal, in particular of an aluminium material, is metered into a casting chamber (1) of a die-casting machine and a casting plunger (2) is then used to press the portion of molten metal into a mould cavity, and wherein an opening (7) in the casting chamber (1) to a runner of the mould cavity is tightly closed again after each shot in such a way that a residue of molten metal remains between the casting plunger (2) and the opening (7) and, during or after a shot, at least partially solidifies and closes the opening (7) in the sense of a mould plug (4), and that a line for feeding the molten metal from a furnace is closed by a second mould plug (4) after the casting chamber (1) has been filled and before the mould cavity has been filled.
- Die-casting process according to Claim 1, characterized in that the casting plunger (2) moves toward the opening (7) in order to form the mould plug.
- Die-casting process according to Claim 1 or 2, characterized in that the mould plug (4) is at least partially melted after the casting chamber (1) has been refilled.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005042867A DE102005042867A1 (en) | 2005-09-08 | 2005-09-08 | diecasting |
PCT/CH2006/000474 WO2007028265A2 (en) | 2005-09-08 | 2006-09-01 | Diecasting method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1934005A2 EP1934005A2 (en) | 2008-06-25 |
EP1934005B1 true EP1934005B1 (en) | 2009-12-09 |
Family
ID=37232579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06775167A Not-in-force EP1934005B1 (en) | 2005-09-08 | 2006-09-01 | Die casting method |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1934005B1 (en) |
AT (1) | ATE451191T1 (en) |
DE (2) | DE102005042867A1 (en) |
WO (1) | WO2007028265A2 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070131375A1 (en) * | 2005-12-09 | 2007-06-14 | Husky Injection Molding Systems Ltd. | Thixo-molding shot located downstream of blockage |
GB0801887D0 (en) * | 2008-02-01 | 2008-03-12 | Smartcast Solutions Ltd | Improvements in and relating to metal casting |
DE102009039595B4 (en) * | 2009-09-01 | 2020-10-15 | Daimler Ag | Low pressure casting device |
AT512229B1 (en) | 2011-11-10 | 2014-10-15 | Mold Thix Consulting Bueltermann Gmbh | DEVICE, APPARATUS AND METHOD FOR THE PRESSURE GASING OF METALLIC MATERIAL IN THE THIXOTROPIC CONDITION |
DE102012102549A1 (en) * | 2011-11-15 | 2013-05-16 | Ferrofacta Gmbh | Die casting nozzle and method for operating the die casting nozzle |
AT515970B1 (en) * | 2014-07-03 | 2018-11-15 | Ltc Gmbh | Method and device for casting at least one component |
DE102015100861B4 (en) | 2015-01-21 | 2018-07-19 | TransMIT Gesellschaft für Technologietransfer mbH | Hot runner for a die casting apparatus and method of operation therefor |
DE102015210403A1 (en) | 2015-06-05 | 2016-12-08 | Oskar Frech Gmbh + Co. Kg | Angular system for a die-casting mold |
DE102015224414A1 (en) * | 2015-12-07 | 2017-06-08 | Volkswagen Aktiengesellschaft | cast device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3831938A1 (en) * | 1987-09-21 | 1989-04-06 | Ube Industries | CASTING DEVICE |
DE4326325C2 (en) * | 1993-08-05 | 1996-07-11 | Inductotherm Coating Equipment | Metallurgical vessel |
SE506043C2 (en) * | 1996-02-01 | 1997-11-03 | Aga Ab | Injection molding process |
DE10039589A1 (en) * | 2000-08-12 | 2002-02-21 | Krauss Maffei Kunststofftech | Device for die casting metallic moldings comprises a preparation unit for metallic material, an accumulation zone, an injection unit, a die casting tool, a flow channel with an outlet nozzle, and a closing unit with closing elements |
ATE327849T1 (en) * | 2000-10-31 | 2006-06-15 | Frech Oskar Gmbh & Co Kg | DEVICE FOR PRODUCING METAL DIE-CAST PARTS, PARTICULARLY FROM NON-FERROUS METALS |
DE10064300C1 (en) * | 2000-12-22 | 2002-04-25 | Bosch Gmbh Robert | Casting mold used for die casting metal components having a cylindrical geometry comprises an in-gate, a molding region, and a casting run with two channels formed as a mold plug receiving chamber |
CA2453170C (en) * | 2002-12-20 | 2012-02-21 | Mold-Masters Limited | Lateral gating injection molding apparatus |
-
2005
- 2005-09-08 DE DE102005042867A patent/DE102005042867A1/en not_active Withdrawn
-
2006
- 2006-09-01 WO PCT/CH2006/000474 patent/WO2007028265A2/en active Application Filing
- 2006-09-01 DE DE502006005612T patent/DE502006005612D1/en active Active
- 2006-09-01 EP EP06775167A patent/EP1934005B1/en not_active Not-in-force
- 2006-09-01 AT AT06775167T patent/ATE451191T1/en active
Also Published As
Publication number | Publication date |
---|---|
ATE451191T1 (en) | 2009-12-15 |
DE502006005612D1 (en) | 2010-01-21 |
WO2007028265A2 (en) | 2007-03-15 |
WO2007028265A3 (en) | 2007-08-02 |
EP1934005A2 (en) | 2008-06-25 |
DE102005042867A1 (en) | 2007-03-22 |
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