EP2106312B1 - Method for spraying a casting mold - Google Patents

Method for spraying a casting mold Download PDF

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Publication number
EP2106312B1
EP2106312B1 EP07845641A EP07845641A EP2106312B1 EP 2106312 B1 EP2106312 B1 EP 2106312B1 EP 07845641 A EP07845641 A EP 07845641A EP 07845641 A EP07845641 A EP 07845641A EP 2106312 B1 EP2106312 B1 EP 2106312B1
Authority
EP
European Patent Office
Prior art keywords
mold
spraying
casting
halves
mould
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.)
Active
Application number
EP07845641A
Other languages
German (de)
French (fr)
Other versions
EP2106312A1 (en
Inventor
Benno Niedermann
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.)
Buehler Druckguss AG
Original Assignee
Buehler Druckguss AG
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 Buehler Druckguss AG filed Critical Buehler Druckguss AG
Publication of EP2106312A1 publication Critical patent/EP2106312A1/en
Application granted granted Critical
Publication of EP2106312B1 publication Critical patent/EP2106312B1/en
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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
    • 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
    • B22D17/2007—Methods or apparatus for cleaning or lubricating 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
    • B22D17/32—Controlling equipment

Abstract

Method for spraying a casting mold, especially the mold halves of a die casting mold, comprises closing the casting mold after moving a spraying device by a defined lift, blowing both mold halves and spraying a cooling and separating agent onto the mold halves, completely opening the mold, removing the spraying device and completely closing the mold.

Description

Die Erfindung betrifft ein Verfahren zum Sprühen einer Giessform, insbesondere einer Druckgiessform nach dem Auswerfen eines gegossenen Teiles.The invention relates to a method for spraying a casting mold, in particular a die-casting mold after ejecting a cast part.

Zur Herstellung von Gussteilen werden geteilte und beim Giessvorgang geschlossene Giessformen verwendet. Beim Druckgiessen wird in die Giessform ein schmelzflüssiger oder teilflüssiger, metallischer Werkstoff unter Druck eingebracht, der in der Form erstarrt. Nachdem das Teil erstarrt ist, wird die Form geöffnet und es kann entnommen werden. Anschliessend wird ein Sprühgerät in die Form eingefahren und es werden nacheinander die Formflächen der festen und der beweglichen Formhälfte besprüht und nachfolgend ausgeblasen. Daraufhin kann die Giessform wieder geschlossen werden um den nächsten Giesszyklus zu starten.For the production of cast parts, split molds that are closed during the casting process are used. During die casting, a molten or partially liquid, metallic material is introduced into the casting mold under pressure, which solidifies in the mold. After the part has solidified, the mold is opened and it can be removed. Subsequently, a sprayer is retracted into the mold and it is successively sprayed the molding surfaces of the fixed and the movable mold half and subsequently blown out. Then the mold can be closed again to start the next casting cycle.

Das Sprühmittel dient dabei sowohl als Kühlmittel wie auch als Trennmittel. Für eine gute Kühlung (beim Auftreffen des Kühlmittels auf eine Wand wird dieser Wärme entzogen) ist es wesentlich, dass das Kühl- und Trennmittel vor der zu besprühenden Giessformwandung positioniert ist, wobei bestimmte Abstände, Zeiträume und Drücke zu beachten sind. Analog gilt dies auch für einen ausreichenden Trenneffekt. Ebenso wird durch das Ausblasen der Giessform mit dem Kühl- und Trennmittel die Giessform gereinigt und das Mittel kann weiterhin bewegliche Teile schmieren.The spraying agent serves both as a coolant and as a release agent. For a good cooling (when the coolant hits a wall, this heat is removed), it is essential that the cooling and separating agent is positioned in front of the mold wall to be sprayed, taking into account certain distances, periods and pressures. Analogously, this also applies to a sufficient separation effect. Likewise, the mold is cleaned by blowing out the mold with the cooling and separating agent and the agent can continue to lubricate moving parts.

Solche Sprühgeräte können auch modular aufgebaut sein (siehe DE-A-4336250 oder EP-A-1468747 ).Such sprayers can also be modular (see DE-A-4336250 or EP-A-1468747 ).

Nach der DE-A-10309930 , US-A-2007/154648 oder der WO 99/47295 ist es auch bekannt, beide Formhälften gleichzeitig bei geöffneter Giessform zu besprühen, wobei gemäss WO 99/47295 das Trennmittel noch gegenüber der geerdeten Giessform elektrostatisch geladen sein kann.After DE-A-10309930 . US-A-2007/154648 or the WO 99/47295 It is also known to spray both mold halves simultaneously with the mold open, according to WO 99/47295 the release agent can still be charged electrostatically against the grounded mold.

Bei einem Verfahren zum Kühlen und Sprühen einer Form gemäss EP-A-941788 wird ein Wärmeentzugselement zwischen die geöffneten Formhälften gebracht, so dass nach einem teilweisen Schliessen der Form die Formwände an diesem Element anbringen um der Form Wärme zu entziehen. In einem separaten Schritt wird die Form gesprüht.In a method for cooling and spraying a mold according to EP-A-941 788 a heat extraction element is placed between the opened mold halves, so that after a partial closure of the mold attach the mold walls to this element to extract heat from the mold. In a separate step, the mold is sprayed.

Der Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren zum Sprühen einer Giessform, insbesondere der Formhälften einer Druckgiessform zu entwickeln, mit dem eine weitere Verbesserung und Vereinfachung des Sprühvorganges erreichbar ist.The invention is based on the object to develop a method for spraying a mold, in particular the mold halves of a die-casting mold, with which a further improvement and simplification of the spraying process can be achieved.

Die Aufgabe ist mit den Merkmalen des Anspruchs 1 gelöst. Nach dem Einfahren des Sprühgerätes wird durch ein teilweises Zufahren der Giessform um einen bestimmten Hub ein gleichzeitiges Sprühen und Ausblasen beider Formhälften erreicht. Nach dem Sprühen und Ausblasen wird die Giessform wieder ganz geöffnet und nach dem Ausfahren des Sprühgerätes wird die Giessform in bekannter Weise für den nächsten Giesszyklus geschlossen.The object is solved with the features of claim 1. After retraction of the sprayer is achieved by a partial closing of the mold to a certain stroke, a simultaneous spraying and blowing out of both mold halves. After spraying and blowing the mold is fully opened again and after the extension of the sprayer, the mold is closed in a known manner for the next molding cycle.

Die Erfindung wird nachfolgend in einem Ausführungsbeispiel näher beschrieben.The invention will be described in more detail in an embodiment.

Eine Druckgiessmaschine umfasst eine geteilte Giessform mit einer festen und einer beweglichen Formhälfte. Die Formhälften weisen Ausnehmungen auf, die im geschlossenen Zustand der Giessform einen geschlossenen Formhohlraum entsprechend der Form des Gussteiles ergeben.A die casting machine comprises a split mold with a fixed and a movable mold half. The mold halves have recesses which, in the closed state of the mold, result in a closed mold cavity corresponding to the shape of the cast part.

Bei geschlossener Form wird der Formhohlraum mittels üblicher Befüllungseinrichtungen unter Druck mit Metallschmelze gefüllt, die im Formhohlraum erstarrt. Nach Erstarrung wird die Giessform geöffnet und das Gussteil wird entnommen oder ausgeworfen. Anschliessend fährt ein Sprühgerät in den Raum zwischen den geöffneten Formhälften ein, worauf die Giessform um einen definierten Hub zugefahren wird. Nachfolgend wird ein Kühl- und Trennmittel auf beide Formhälften gleichzeitig aufgetragen und beide Seiten werden miteinander ausgeblasen. Danach wird die Giessform wieder vollständig geöffnet und das Sprühgerät kann ausfahren.When the mold is closed, the mold cavity is filled with molten metal under pressure by means of customary filling devices, which solidifies in the mold cavity. After solidification, the mold is opened and the casting is removed or ejected. Subsequently, a sprayer enters the space between the open mold halves, whereupon the mold is closed by a defined stroke. Subsequently, a cooling and release agent is applied to both mold halves simultaneously and both sides are blown out together. Thereafter, the mold is fully opened again and the sprayer can extend.

Nach dem Ausfahren des Sprühgerätes wird die Giessform für den nächsten Giesszyklus wieder vollständig verschlossen.After the sprayer has been extended, the casting mold is completely closed again for the next casting cycle.

Claims (2)

  1. Method for spraying a casting mould, the mould halves of a die-casting mould, by introducing a spraying device into the completely open casting mould or between the open mould halves, characterized in that
    ➢ the casting mould is closed by a defined travel after the spraying device has been introduced,
    ➢ the two mould halves are then blown out, and then a cooling and release agent is sprayed onto the mould halves,
    ➢ then the casting mould is completely opened again and the spraying device is moved out,
    ➢ the casting mould is then completely closed.
  2. Method according to Claim 1, characterized in that the cooling and release agent is sprayed onto both mould halves at the same time.
EP07845641A 2006-12-29 2007-12-20 Method for spraying a casting mold Active EP2106312B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006062558A DE102006062558A1 (en) 2006-12-29 2006-12-29 Method for spraying a casting mold, especially the mold halves of a die casting mold, comprises closing the casting mold after moving a spraying device by a defined lift, blowing both mold halves and further processing
PCT/CH2007/000644 WO2008080242A1 (en) 2006-12-29 2007-12-20 Method for spraying a casting mold

Publications (2)

Publication Number Publication Date
EP2106312A1 EP2106312A1 (en) 2009-10-07
EP2106312B1 true EP2106312B1 (en) 2011-10-26

Family

ID=39247133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07845641A Active EP2106312B1 (en) 2006-12-29 2007-12-20 Method for spraying a casting mold

Country Status (4)

Country Link
EP (1) EP2106312B1 (en)
AT (1) ATE530273T1 (en)
DE (1) DE102006062558A1 (en)
WO (1) WO2008080242A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4336250A1 (en) 1993-10-23 1995-04-27 Wotec Automationssysteme Gmbh Spray block of a spray tool
DE19810032A1 (en) * 1998-03-09 1999-09-16 Acheson Ind Inc Method and device for preparing the mold walls of a mold for primary shaping or shaping for the next molding cycle, spray element with centrifugal atomization and air guidance and use of such a spray element for spraying essentially solvent-free mold wall treatment agents
WO1999047295A1 (en) 1998-03-13 1999-09-23 Wotec Automationssysteme Gmbh Spraying device for casting molds
DE10309930A1 (en) 2003-03-07 2004-09-23 Daimlerchrysler Ag Configuration of a spray system for wetting a casting tool mold by a coolant based on a computer data model of the casting tool useful in the computer simulation of casting processes
ES2258677T3 (en) 2003-04-19 2006-09-01 Oskar Frech Gmbh + Co. Kg SPRAY HEAD FOR A SPRAYING TOOL.
JP4866083B2 (en) * 2005-12-26 2012-02-01 東芝機械株式会社 Method and apparatus for spraying mold release agent in die casting machine

Also Published As

Publication number Publication date
WO2008080242A1 (en) 2008-07-10
DE102006062558A1 (en) 2008-07-03
EP2106312A1 (en) 2009-10-07
ATE530273T1 (en) 2011-11-15

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