EP0790090B1 - Vakuum-Druckgiessmachine - Google Patents
Vakuum-Druckgiessmachine Download PDFInfo
- Publication number
- EP0790090B1 EP0790090B1 EP97102390A EP97102390A EP0790090B1 EP 0790090 B1 EP0790090 B1 EP 0790090B1 EP 97102390 A EP97102390 A EP 97102390A EP 97102390 A EP97102390 A EP 97102390A EP 0790090 B1 EP0790090 B1 EP 0790090B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mould
- casting
- die
- casting machine
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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
- B22D17/14—Machines with evacuated die cavity
-
- 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
- B22D17/2227—Die seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
Definitions
- the invention relates to a vacuum die casting machine according to the Preamble of claim 1.
- a die casting machine according to the preamble of claim 1 is known from EP 0 051 310 B1 become after the so-called vacuum die casting process is working.
- the molten metal is made a holding furnace through an intake pipe into the casting chamber sucked in by means of negative pressure, the negative pressure via a Vacuum system is applied in the mold engraving of the casting mold.
- This patent also addresses the problem of sufficient Degassing of the melt addressed during the casting process.
- the aim of the vacuum die casting process is one Improvement of the casting quality by evacuation of the Die casting mold and extraction of the reaction gases from the mold and the gun chamber.
- the Negative pressure to the melt from the holding furnace in the Transporting the casting chamber is known from EP 0 051 310 B1 become after the so-called vacuum die casting process is working.
- the molten metal is made a holding furnace through an intake pipe into the casting chamber sucked in by means of negative pressure, the negative pressure via a Vacuum system is applied in the mold engraving of the casting mold.
- This patent
- the cited reference also mentions the problem of existing residual gas and swirling of the melt what can lead to significant quality losses. To remedy this It was proposed in this patent to create several Vacuum connections to improve evacuation to provide. For example, there is another vacuum connection to be provided on the casting piston itself.
- the mold consists of a movable as well fixed mold half, the latter generally with the casting chamber is connected to the casting piston and the Holding furnace via an intake pipe to the casting mold part of the casting chamber facing away.
- the movable mold half is used for a casting process drove the fixed mold half, with an elastic and temperature resistant gasket surrounds the mold cavity and the Form halves sealed against each other.
- Such Sealing arrangement is for example in EP-A1-0 230 660, 1 with reference numeral 64.
- the seal When the mold halves are moved together, the seal stands with a small distance on the order of e.g. 2 mm against the contact surfaces of the mold halves in order to Compress the mold halves to act as a seal.
- the circumferential seal spans a surface area that definitely in connection with the overhang height of the seal leads to a remarkable cavity for air entrapment.
- a medium-sized mold with a rectangular arrangement of seals of 700 x 900 mm and a protrusion of the seal over the flat surface of e.g. 2 mm, this leads to an air inclusion with a volume of 1.26 liters.
- EP-A-0 559 920 is a vertical die casting machine in which the Mold cavity with a sprue after closing the Mold halves is evacuated. During this process, the the casting chamber connected to it by means of a double one Piston arrangement closed. The vacuum serves at one such system not to transport the melt from one Holding furnace. Rather, this is via a metering device entered in the casting chamber.
- DE-A-43 10 755 is a horizontal die casting machine became known, in which by means of a Pressurizing the mold cavity and a sprue and part of the casting chamber is evacuated.
- One serves Subdivision of the casting chamber into two casting chamber halves by means of a fitting that no melt prematurely in the Mold cavity can get.
- the invention has for its object the above Avoid disadvantages and especially an additional one To prevent air supply to the holding oven by this effect.
- the invention has compared to the known prior art Advantage that when moving the mold halves together Sealing arrangement air not trapped by the Intake pipe can get into the holding oven.
- the gas recoil through this air cushion is at least as long from Heated holding oven held until a pressure release in the mold or the casting chamber leads to a pressure equalization that it prevents the gas or trapped air from entering the Holding furnace flows.
- This pressure reduction takes place e.g. by the evacuation valve connected to the atmosphere instead. This avoids that an additional Gas exposure to the melt in the holding furnace and the so associated disadvantages occur.
- Casting sets are from various references become known, the one after a casting process Carry out an empty stroke of the casting piston inside the casting chamber, for example tinsel from the inside of the gun chamber eject and / or spray oil lubrication on the Apply the inner wall of the casting chamber (see e.g. DE 43 16 927 A1).
- This additional stroke during the Return stroke can be used according to the invention when Form closing the plunger between the mouth of the Intake pipe into the casting chamber and the mold cavity position. In this case the gas recoil cannot Affect holding oven. Only then will the casting piston permanently withdrawn when the closing process ends and if necessary via the still associated with the atmosphere Evacuation device for pressure reduction has taken place.
- the intake pipe can also be used with other means, such as e.g. Gate valve or the like opposite the casting chamber separate so that this gas recoil when the Mold halves do not affect the melt in the holding furnace.
- other means such as e.g. Gate valve or the like opposite the casting chamber separate so that this gas recoil when the Mold halves do not affect the melt in the holding furnace.
- the casting piston By arranging the casting piston in the front position at Bringing together the mold halves is the interior of the casting chamber closed off from the mold cavity. After merging of the mold halves, the casting piston is directed towards the rear Intake pipe pulled, which is a kind of additional evacuation or
- Fig. 1 of a die casting machine 1 is only indicated, the fixed platen 2 with attached fixed mold half 3, which cooperates with the movable mold half 4.
- the mold engraving or the mold cavity 5, which is to be filled with molten metal, is located between the fixed 3 and the movable mold half 4.
- a casting chamber 6 with a casting piston 7 is provided, into which the molten metal 8 is drawn in from a holding furnace 10 via an intake pipe 9.
- the molten metal is sucked out of the holding furnace 10 or a holding device by applying a vacuum.
- the mold cavity 5 is connected to the evacuation device 11 via a suction channel 14, the negative pressure being applied in the mold engraving 15 of the casting mold consisting of the mold halves 3, 4.
- the two mold halves 3, 4 are sealed by a circumferential elastic and temperature-resistant seal 16 which can be designed, for example, as a silicone cord.
- the sealing arrangement 16 spans, for example, the mold cavity 5 in a rectangular or square shape, the surface sealed thereby being formed by the height h 1 and the width b 1 , not shown, leading into the drawing plane of FIG. 1.
- an area h 1 x w 1 700 x 900 mm.
- the seal 16 is inserted in a groove 17 of the fixed mold half 3 and it has a diameter d 1 in the unloaded state.
- the seal 16 projects in the unloaded state by an amount l 1 relative to the end face 18 of the mold half 3.
- the seal 16 just touches the end face 19 of the mold half 4 when the two mold halves 3, 4 move together.
- the increased volume V 1 from the gap with the width l 1 can be compensated for by increasing the volume of the casting chamber 6 and / or by suction using the evacuation device 11 or by releasing the vacuum valve to the atmosphere.
- the chamber volume 22 of the casting chamber increases.
- the pressure can be reduced and an underpressure can be generated in the casting chamber and / or in the mold cavity 5.
- the starting position of the casting piston 7 in its forward position is therefore optimized as a function of the other parameters and in particular also the volume of the mold cavity 5. If the volume V 2 of the mold cavity 5 is very small due to the cast part to be produced, the casting piston must rather be arranged in a rear position (to the right in FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
- Fig. 1
- die Darstellung einer Vakuum-Druckgießmaschine mit sich schließenden Formhälften im Ausgangszustand und
- Fig. 2
- die gleiche Anordnung nach Fig. 1 jedoch mit geschlossenen Formhälften.
Claims (6)
- Vakuum-Druckgießmaschine mit einer aus einer stationären (3) und einer beweglichen (4) Formhälfte gebildeten Gießform, die über eine elastische Dichtung (16) beim Evakuierungsvorgang bzw. Gießvorgang gegeneinander abgedichtet sind und mit einer, der stationären Formhälfte (3) zugeordneten Gießkammer (6) mit Gießkolben (7) in die ein Ansaugrohr (9) zur Zuführung der Schmelze (8) aus einem Warmhalteofen (10) mündet, wobei die Unterdruckbeaufschlagung des Formhohlraums (5) sowie der Gießkammer (6) und das Ansaugen der Schmelze in die Gießkammer (6) mittels einer am Formhohlraum (5) angeschlossenen Evakuierungseinrichtung (11) erfolgt, dadurch gekennzeichnet, daß zur Vermeidung einer Gaszuführung in den Schmelze-Warmhalteofen (10) während des Schließvorgangs der Formhälften (3, 4) ein Absperrmittel zur Absperrung des Warmhalteofens (10) gegenüber dem Formhohlraum (5) vorgesehen ist, wobei die Absperrung so lange erfolgt, bis der Überdruck im Formhohlraum (5) bzw. im Gießkammerinnenraum (22) weitestgehend abgebaut ist.
- Druckgießmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Absperrung des Warmhalteofens (10) durch ein Anordnen des Gießkolbens (7) zwischen Gießform (3, 4) und Ansaugmündung (20) des Ansaugrohres (9) erfolgt.
- Druckgießmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Gießkolben (7) während oder nach dem Schließvorgang der Formhälfte (3, 4) der Gießform aus einer vorderen, nahe der Gießform (3, 4) gelegenen Lage zum Druckabbau zurückfährt.
- Druckgießmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Mündung (20) des Ansaugrohrs (9) durch einen Schieber verschlossen ist.
- Druckgießmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Ventilanordnung (12) vorgesehen ist welche nach dem Schließvorgang der Formhälfte bis zum Überdruckabbau in einer Schaltstellung verbleibt, die eine Verbindung von Formhohlraum (5) mit der Atmosphäre darstellt.
- Druckgießmaschine nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, daß eine Ventilanordnung (12) vorgesehen ist, welche während des Schließvorgangs der Formhälften kurzzeitig auf Evakuierung schaltet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19605727 | 1996-02-16 | ||
DE19605727A DE19605727A1 (de) | 1996-02-16 | 1996-02-16 | Vakuum-Druckgießmaschine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0790090A2 EP0790090A2 (de) | 1997-08-20 |
EP0790090A3 EP0790090A3 (de) | 1998-07-08 |
EP0790090B1 true EP0790090B1 (de) | 2000-06-28 |
Family
ID=7785557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97102390A Expired - Lifetime EP0790090B1 (de) | 1996-02-16 | 1997-02-14 | Vakuum-Druckgiessmachine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0790090B1 (de) |
DE (2) | DE19605727A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10054870B4 (de) * | 2000-11-06 | 2008-04-24 | Bühler Druckguss AG | Druckgiessmaschine |
WO2012100789A1 (de) | 2011-01-28 | 2012-08-02 | Idra S.R.L. | Vakuum-druckgiessmaschine |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6070643A (en) * | 1997-09-12 | 2000-06-06 | Howmet Research Corporation | High vacuum die casting |
DE19841229A1 (de) * | 1998-09-09 | 2000-03-16 | Alusuisse Bayrisches Druckgus | Druckgießmaschine für den Leichtmetallguß in einer evakuierten Form |
DE19925148A1 (de) * | 1999-06-02 | 2000-12-07 | Mueller Weingarten Maschf | Verhinderung der Oxidation der Schmelze bei einer nach einem Vakuumverfahren arbeitenden Druckgießmaschine |
DE19952116B4 (de) * | 1999-10-29 | 2006-09-28 | Audi Ag | Verwendung eines Metall-Druckgussstückes, hergestellt durch Vakuumgießen |
DE10135724B4 (de) * | 2001-07-26 | 2005-07-21 | Müller Weingarten AG | Abdichtung von Formen |
JP3921513B2 (ja) | 2002-04-17 | 2007-05-30 | 株式会社木村工業 | 成型装置及びそれに用いる型ユニット |
DE102004057324A1 (de) * | 2004-11-27 | 2006-06-01 | Pfeiffer Vacuum Gmbh | Vakuumdruckgussverfahren |
CH700743A1 (de) * | 2009-04-06 | 2010-10-15 | Fondarex Sa | Entlüftungseinrichtung für Giessvorrichtungen. |
DE102016123495A1 (de) | 2016-12-05 | 2018-06-07 | Schuler Pressen Gmbh | Werkzeug zum Gießen und/oder Umformen eines Bauteils, Gießvorrichtung, Presse und Verfahren zur Spaltkompensation |
CN114603100B (zh) * | 2022-02-17 | 2022-11-08 | 湖南大学 | 一种高强高韧铝合金减震塔高压真空压铸方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3041340A1 (de) | 1980-11-03 | 1982-05-13 | Maschinenfabrik Weingarten Ag, 7987 Weingarten | Druckgiessverfahren zur herstellung von gasarmer, porenarmer und oxydarmer gussstuecke sowie druckgiessmaschine zur durchfuehrung des verfahrens |
JPS6061158A (ja) * | 1983-09-15 | 1985-04-08 | Toyota Motor Corp | 吸引鋳造装置 |
JPS62156063A (ja) | 1985-12-27 | 1987-07-11 | Nippon Denso Co Ltd | ダイカスト方法およびダイカスト装置 |
DE3760303D1 (en) * | 1986-04-11 | 1989-08-17 | Alusuisse | Process and plant for pressure casting |
EP0559920B1 (de) * | 1991-10-25 | 1998-07-22 | Toyota Jidosha Kabushiki Kaisha | Vorrichtung zum vakuum-giessen |
DE4310755C2 (de) * | 1993-04-01 | 1996-04-25 | Druckgusswerk Moessner Gmbh We | Druckgießvorrichtung |
DE4316927A1 (de) | 1993-05-19 | 1994-11-24 | Mueller Weingarten Maschf | Gießgarnitur für eine Druckgießmaschine |
-
1996
- 1996-02-16 DE DE19605727A patent/DE19605727A1/de not_active Withdrawn
-
1997
- 1997-02-14 EP EP97102390A patent/EP0790090B1/de not_active Expired - Lifetime
- 1997-02-14 DE DE59701920T patent/DE59701920D1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10054870B4 (de) * | 2000-11-06 | 2008-04-24 | Bühler Druckguss AG | Druckgiessmaschine |
WO2012100789A1 (de) | 2011-01-28 | 2012-08-02 | Idra S.R.L. | Vakuum-druckgiessmaschine |
Also Published As
Publication number | Publication date |
---|---|
DE19605727A1 (de) | 1997-08-21 |
DE59701920D1 (de) | 2000-08-03 |
EP0790090A3 (de) | 1998-07-08 |
EP0790090A2 (de) | 1997-08-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0790090B1 (de) | Vakuum-Druckgiessmachine | |
DE3518635C2 (de) | Druckgußvorrichtung | |
DE102009051879B3 (de) | Metall-Druckgussmaschine | |
DE3727640C2 (de) | ||
CH654768A5 (de) | Entgasungsvorrichtung an einer druck- oder spritzgiessform. | |
DE112013006075B4 (de) | Giessvorrichtung und Giessverfahren | |
DE10207028A1 (de) | Spritzgießmaschine | |
EP2946852A1 (de) | Vakuumdruckgussanlage und Verfahren zum Betrieb einer Vakuumdruckgussanlage | |
CH710347A2 (de) | Ventileinrichtung zum Entlüften von Druckgiessformen. | |
DE102007060418B4 (de) | Verfahren und Vorrichtung zum Vakuum-Druckgießen zur Herstellung von porenarmen und warmbehandelbaren Gussteilen | |
EP0442128A2 (de) | Verfahren zum Herstellen von Mehrschichtformkörpern | |
DE19807567C2 (de) | Druckgußmaschine | |
DE102017109716B3 (de) | Metall-Druckguss-Formwerkzeug | |
DE4114985A1 (de) | Verfahren zum nachverdichten und druck- oder spritzgiessmaschine hierfuer | |
DE19807568C2 (de) | Druckgußmaschine | |
EP1299203A2 (de) | Verfahren und vorrichtung zum steigenden giessen mit einem auf den giesstisch aufgesetzten schieberverschluss | |
DE4313812B4 (de) | Druckguß-Vakuumventil | |
EP0097115B1 (de) | Vorrichtung und Verfahren zum Strangpressen von Profilen od. dgl. aus einem Block oder Bolzen | |
DE19850499C1 (de) | Verfahren und Vorrichtung zum Druck- oder Spritzgießen | |
DE1751352A1 (de) | Hydraulischer Antrieb,insbesondere Schliessvorrichtung fuer Spritzgussmaschinen | |
EP3450049B1 (de) | Druckgussvorrichtung sowie verfahren zum schmieren eines giesskolbens | |
DE3240242C2 (de) | ||
DE3239838A1 (de) | Vorrichtung zur verhinderung des austretens eines in einer gussform verbleibenden geschmolzenen materials | |
DE2353960C3 (de) | Verfahren zum Strangpressen von Schreibstiftminen, Schreibkreiden o. dgl. und Kolbenpresse zur Durchführung des Verfahrens | |
DE19511282A1 (de) | Dauerform einer Gießanlage und Gießverfahren |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): CH DE FR LI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): CH DE FR LI |
|
17P | Request for examination filed |
Effective date: 19980901 |
|
17Q | First examination report despatched |
Effective date: 19990204 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR LI |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: KELLER & PARTNER PATENTANWAELTE AG |
|
REF | Corresponds to: |
Ref document number: 59701920 Country of ref document: DE Date of ref document: 20000803 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PCAR Free format text: NEW ADDRESS: EIGERSTRASSE 2 POSTFACH, 3000 BERN 14 (CH) |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20160302 Year of fee payment: 20 Ref country code: CH Payment date: 20160222 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20160222 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 59701920 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |