[go: up one dir, main page]

EP0790090B1 - Machine de coulée à dépression - Google Patents

Machine de coulée à dépression Download PDF

Info

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
Application number
EP97102390A
Other languages
German (de)
English (en)
Other versions
EP0790090A2 (fr
EP0790090A3 (fr
Inventor
Wilfried Schwab
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.)
Mueller Weingarten AG
Original Assignee
Mueller Weingarten 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 Mueller Weingarten AG filed Critical Mueller Weingarten AG
Publication of EP0790090A2 publication Critical patent/EP0790090A2/fr
Publication of EP0790090A3 publication Critical patent/EP0790090A3/fr
Application granted granted Critical
Publication of EP0790090B1 publication Critical patent/EP0790090B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)

Claims (6)

  1. Machine de coulée sous pression sous vide, comportant un moule de coulée formé par une moitié de moule fixe (3) et une moitié de moule mobile (4), qui sont étanchéifiées l'une par rapport à l'autre par l'intermédiaire d'un joint étanche élastique (16) lors du processus de coulée ou lors du processus de mise en dépression, et une chambre de coulée (6) associée à la moitié de moule fixe (3), ayant un piston de coulée (7) dans lequel débouche un tube d'aspiration (9) pour l'amenée de la matière en fusion (8) à partir d'un four de maintien en température (10), la mise en dépression de la cavité (5) du moule ainsi que de la chambre de coulée (6) et l'aspiration de la matière en fusion dans la chambre de coulée (6) ayant lieu au moyen d'un dispositif de mise en dépression (11) raccordé à la cavité (5) du moule,
    caractérisée en ce que, pour éviter une amenée de gaz dans le four de maintien en température (10) de la matière en fusion pendant le processus de fermeture des moitiés de moule (3,4), il est prévu un moyen de fermeture pour fermer le four de maintien en température (10) par rapport à la cavité (5) du moule, la fermeture étant effectuée jusqu'à ce que la surpression dans la cavité (5) du moule ou dans l'espace interne (22) de la chambre de coulée soit très largement supprimée.
  2. Machine de coulée sous pression selon la revendication 1,
    caractérisée en ce que la fermeture du four (10) de maintien en température est effectuée par l'agencement du piston de coulée (7) entre le moule de coulée (3,4) et l'embouchure (20) du tube d'aspiration (9).
  3. Machine de coulée sous pression selon la revendication 1 ou 2,
    caractérisée en ce que le piston de coulée (7), pendant ou après le processus de fermeture des moitiés de moule (3,4) du moule de coulée, recule à partir d'une position avant à proximité du moule de coulée (3,4) pour la suppression de pression.
  4. Machine de coulée sous pression selon la revendication 1,
    caractérisée en ce que l'embouchure (20) du tube d'aspiration (9) est fermée par un coulisseau.
  5. Machine de coulée sous pression selon la revendication 1 ou 2,
    caractérisée en ce qu'un agencement de soupape (12) est prévu, lequel demeure, après le processus de fermeture des moitiés de moule jusqu'à la suppression de la surpression, dans une position de commutation qui représente une liaison de la cavité (5) du moule avec l'atmosphère.
  6. Machine de coulée sous pression selon une des revendications précédentes 1 à 4,
    caractérisée en ce qu'un agencement de soupape (12) est prévu lequel, pendant le processus de fermeture des moitiés de moule, est temporairement commuté pour la mise en dépression.
EP97102390A 1996-02-16 1997-02-14 Machine de coulée à dépression Expired - Lifetime EP0790090B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19605727A DE19605727A1 (de) 1996-02-16 1996-02-16 Vakuum-Druckgießmaschine
DE19605727 1996-02-16

Publications (3)

Publication Number Publication Date
EP0790090A2 EP0790090A2 (fr) 1997-08-20
EP0790090A3 EP0790090A3 (fr) 1998-07-08
EP0790090B1 true EP0790090B1 (fr) 2000-06-28

Family

ID=7785557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97102390A Expired - Lifetime EP0790090B1 (fr) 1996-02-16 1997-02-14 Machine de coulée à dépression

Country Status (2)

Country Link
EP (1) EP0790090B1 (fr)
DE (2) DE19605727A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10054870B4 (de) * 2000-11-06 2008-04-24 Bühler Druckguss AG Druckgiessmaschine
WO2012100789A1 (fr) 2011-01-28 2012-08-02 Idra S.R.L. Machine à coulée sous pression sous vide

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
EP0241426B1 (fr) * 1986-04-11 1989-07-12 Schweizerische Aluminium Ag Procédé et dispositif de coulée sous pression
DE69226353T2 (de) * 1991-10-25 1998-12-24 Toyota Jidosha K.K., Toyota, Aichi 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10054870B4 (de) * 2000-11-06 2008-04-24 Bühler Druckguss AG Druckgiessmaschine
WO2012100789A1 (fr) 2011-01-28 2012-08-02 Idra S.R.L. Machine à coulée sous pression sous vide

Also Published As

Publication number Publication date
DE19605727A1 (de) 1997-08-21
DE59701920D1 (de) 2000-08-03
EP0790090A2 (fr) 1997-08-20
EP0790090A3 (fr) 1998-07-08

Similar Documents

Publication Publication Date Title
EP0790090B1 (fr) Machine de coulée à dépression
DE3518635C2 (de) Druckgußvorrichtung
DE102009051879B3 (de) Metall-Druckgussmaschine
DE3727640C2 (fr)
CH654768A5 (de) Entgasungsvorrichtung an einer druck- oder spritzgiessform.
DE10207028A1 (de) Spritzgießmaschine
EP2946852A1 (fr) Installation de coulée sous pression à vide et procédé de fonctionnement d'une installation de coulée sous pression à vide
DE102007060418B4 (de) Verfahren und Vorrichtung zum Vakuum-Druckgießen zur Herstellung von porenarmen und warmbehandelbaren Gussteilen
DE2250780A1 (de) Verfahren und vorrichtung zum niederdruckgiessen
EP0442128A2 (fr) Procédé pour fabriquer des corps moulés à plusieurs couches
DE19807567C2 (de) Druckgußmaschine
DE69610550T2 (de) Verfahren und vorrichtung zum pressgissen
DE102017109716B3 (de) Metall-Druckguss-Formwerkzeug
DE19807568C2 (de) Druckgußmaschine
DE4313812B4 (de) Druckguß-Vakuumventil
DE69415432T2 (de) Verfahren und Vorrichtung zum Vakuumdruckgiessen
EP0097115B1 (fr) Dispositif et procédé pour le filage de profils ou analogue d'un bloc ou d'une billette
DE19850499C1 (de) Verfahren und Vorrichtung zum Druck- oder Spritzgießen
DE69108306T2 (de) Verfahren, Giessform und Vorrichtung zum mehrstufigen Niederdruckgiessen von Metall.
EP3450049B1 (fr) Dispositif de moulage sous pression ainsi que procédé de lubrification d'un piston d'injection
DE3240242C2 (fr)
DE69405543T2 (de) Spritzgiessform und verfahren zum spritzgiessen eines gegenstandes
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