EP1165274A1 - Method for vacuum diecasting and diecasting mould - Google Patents
Method for vacuum diecasting and diecasting mouldInfo
- Publication number
- EP1165274A1 EP1165274A1 EP00903480A EP00903480A EP1165274A1 EP 1165274 A1 EP1165274 A1 EP 1165274A1 EP 00903480 A EP00903480 A EP 00903480A EP 00903480 A EP00903480 A EP 00903480A EP 1165274 A1 EP1165274 A1 EP 1165274A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- mold
- valve
- vacuum
- mold 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
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
- B22D17/14—Machines with evacuated die cavity
Definitions
- the invention relates to a method for vacuum die casting, in particular for producing the negative pressure in the casting chamber and in the mold cavity of a die, and a die.
- the molten metal is sucked into the casting chamber by means of negative pressure.
- the vacuum is applied in the casting mold by means of a suction channel. This negative pressure is maintained until the casting mold is filled with molten metal due to the feed movement of the casting piston.
- DE-A-4239558 also describes such a method, in which the evacuation of the air is improved and it is also intended to be used in the normal die-casting method.
- the vacuum should not only be taken into account with regard to its size (pressure value and duration), but the vacuum should also be adapted to the exact conditions. This should be done by continuously regulating the vacuum over the period of exposure to negative pressure, in particular to avoid premature entry of molten metal into the mold cavity. If necessary, hold times of the vacuum should be observed.
- the application of negative pressure to the casting mold or casting chamber via at least one control valve takes place in such a way that the negative pressure in the mold cavity and / or in the casting chamber is regulated according to a controllable curve with at least two time segments, as a function of the quantity introduced and / or of the casting piston travel. This is complex and uncertain.
- DE-A-19605727 shows a vacuum die-casting machine in which the mold halves are sealed off from one another by means of a sealing arrangement. To prevent compressed air from being forced into the molten metal of the holding furnace, the casting piston closes the suction pipe during the vacuum phase.
- DE-PS 921881 shows in closings of the pouring channel without ventilation by means of a displaceable insert bush
- DE-A-4312647 teaches an effective piston seal in the form of a ring device in vacuum pressure casting. This is to prevent the cast material from getting into the mold space before the piston drives the shot into the mold cavity.
- a detection element is provided in a gas ventilation device of a die casting machine, which detects cast metal and outputs a signal.
- a detection element is provided in a gas ventilation device of a die casting machine, which detects cast metal and outputs a signal.
- JP-A-1024951 it is also known to carry out an oxygen measurement in the mold cavity.
- the invention is based on the object of developing a method for vacuum pressure die-casting which avoids the disadvantages of the prior art, in particular by simpler and safer process management and better casting quality and an increase in the available shot time. These tasks are solved on the basis of the characterizing features of claim 1.
- the main idea of the invention is then to separate the evacuation process and the filling of the mold from one another and to carry out both processes independently of one another. This object is achieved on the basis of the characterizing features of claim 1.
- Another object of the invention is to develop a die casting mold for carrying out the method. This object is achieved on the basis of the characterizing features of claim 4.
- the advantages of the invention consist primarily in the fact that the temporary, spatial separation of evacuation and subsequent filling of the mold means more time for evacuation.
- the mold cavity is available for the individual shot (without extending the shot time itself) and at the same time the quality of the parts is improved and better alloys can be processed.
- the invention is described in more detail in an exemplary embodiment with reference to a drawing.
- the drawing shows a simplified view of a casting chamber in the single figure.
- the general structure of a die casting machine and also a vacuum die casting machine is generally known, for. B. from DE-A-4239558.
- a schematically and simplified illustrated vacuum die 1 has a fixed mold plate 2 with a fixed mold insert 3 attached to it, which fits in the closed state on a movable mold half 4a with the mold insert 4b.
- the mold cavity 5 to be filled with molten metal is formed between the mold inserts 3, 4b.
- the die 1 also has a casting chamber 6 with a casting piston 7 guided therein.
- a metering opening 8a or 8b the metal melt is optionally fed and metered from below or from above out of a holding vessel (not shown).
- the channel opening 10 of the casting chamber 6 can be closed with a beveled valve 11.
- the valve 11 is connected to a conventional hydraulic system 13 via a piston rod 12.
- a seal 14 seals the valve system from the evacuated mold cavity 5.
- a hydraulic system other conventional means can also be used.
- the mold cavity 5 is connected via a ventilation duct 15 to a conventional device for generating negative pressure and to a vacuum shut-off valve 16.
- the channel opening 10 is closed by means of valve 11 and hydraulics 13.
- the procedure can be described in such a way that before the molten metal reaches the casting chamber 6, the mold cavity 5 and the sprue channel 9 can already be evacuated via the shut-off valve 16,
- the press-in process is started, in which the casting piston 7 slowly moves forward via the metering opening 8 (left),
- valve 1 1 When the state of 100% filling of the casting chamber with molten metal is reached, the valve 1 1 suddenly opens by means of the hydraulics 13 and clears the way for the metal into the sprue channel 9 and into the mold cavity 5.
- the impulse for switching can also be path-dependent or by means of a sensor system known per se.
- the molten metal fills the mold cavity 5 very quickly and without disruptive compression of displaced air.
- the mold cavity 5 to be filled is only released when it is vented.
- the molten metal is previously 100% filled in the casting chamber 6, 6N.
- a further ventilation of the casting chamber 6 ' (6) or the valve 11 in the sprue channel 9 can be provided.
- the metering opening 8 is closed by the casting piston 7.
- the hydraulic system 13 is temperature-separated from the casting chamber 6 and the mold due to the arrangement described.
- Casting piston a dosing opening b dosing opening
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914830A DE19914830A1 (en) | 1999-04-01 | 1999-04-01 | Vacuum die casting process involves opening the evacuated die cavity only after complete filling of the casting chamber with molten metal |
DE19914830 | 1999-04-01 | ||
PCT/CH2000/000093 WO2000059658A1 (en) | 1999-04-01 | 2000-02-21 | Method for vacuum diecasting and diecasting mould |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1165274A1 true EP1165274A1 (en) | 2002-01-02 |
EP1165274B1 EP1165274B1 (en) | 2002-12-04 |
Family
ID=7903222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00903480A Expired - Lifetime EP1165274B1 (en) | 1999-04-01 | 2000-02-21 | Method for vacuum diecasting and diecasting mould |
Country Status (8)
Country | Link |
---|---|
US (1) | US6997231B1 (en) |
EP (1) | EP1165274B1 (en) |
AT (1) | ATE228906T1 (en) |
AU (1) | AU2531200A (en) |
DE (2) | DE19914830A1 (en) |
DK (1) | DK1165274T3 (en) |
ES (1) | ES2185566T3 (en) |
WO (1) | WO2000059658A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10033166A1 (en) * | 2000-07-07 | 2002-01-24 | Hengst Walter Gmbh & Co Kg | Device for producing castings, with a wall that can be guided into the casting mold |
DE10054870B4 (en) * | 2000-11-06 | 2008-04-24 | Bühler Druckguss AG | die casting machine |
DE10122028A1 (en) * | 2001-05-07 | 2002-11-14 | Buehler Druckguss Ag Uzwil | Process for die casting and die casting machine |
DE10357365B4 (en) * | 2002-12-11 | 2007-05-03 | Metal Technologies Sachs Giesserei Gmbh | Die casting apparatus and method for die casting with a defined in-mold pressure |
DE102004057324A1 (en) * | 2004-11-27 | 2006-06-01 | Pfeiffer Vacuum Gmbh | Vacuum die casting process |
DE102007012577A1 (en) | 2007-03-13 | 2008-09-18 | Bühler Druckguss AG | Process for venting molds |
CA2628504C (en) | 2007-04-06 | 2015-05-26 | Ashley Stone | Device for casting |
US7784525B1 (en) | 2007-05-19 | 2010-08-31 | Zhongnan Dai | Economical methods and injection apparatus for high pressure die casting process |
DE102008055506A1 (en) | 2008-12-11 | 2010-06-17 | Bühler Druckguss AG | Pressure die-casting the parts made of metal alloy e.g. aluminum using horizontal cold chamber die-casting machine, comprises filling respective dosage of metal melt into casting chamber and subsequently pressing the melt by casting piston |
CH700743A1 (en) * | 2009-04-06 | 2010-10-15 | Fondarex Sa | Ventilation device for molding means. |
DE102009033532B4 (en) * | 2009-07-10 | 2020-11-19 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Extruder for manufacturing a component made of light metal |
US8459331B2 (en) * | 2011-08-08 | 2013-06-11 | Crucible Intellectual Property, Llc | Vacuum mold |
DE102013105433B3 (en) * | 2013-05-27 | 2014-05-22 | Schuler Pressen Gmbh | Casting device with a loop and casting process |
US10040117B2 (en) | 2016-12-29 | 2018-08-07 | Vinet Micro-Technologies Inc. | Contaminant-purging cold chamber die casting apparatus and method |
CN113634732A (en) * | 2021-08-04 | 2021-11-12 | 广东鸿图科技股份有限公司 | Horizontal high-vacuum die-casting system and die-casting method |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH337987A (en) * | 1955-06-21 | 1959-04-30 | Lilly Co Eli | Process for the preparation of penicillin salts |
CH661883A5 (en) * | 1982-10-20 | 1987-08-31 | Inst Po Metalloznanie I Tekno | Submerged-plunger (hot-chamber piston) die-casting method and a machine for carrying out the method |
JP2519416B2 (en) * | 1986-03-20 | 1996-07-31 | 大和工業株式会社 | Die casting method and die casting equipment |
JPH02151358A (en) * | 1988-11-30 | 1990-06-11 | Keihin Seiki Mfg Co Ltd | Vacuum die casting device |
US5076344A (en) * | 1989-03-07 | 1991-12-31 | Aluminum Company Of America | Die-casting process and equipment |
JPH03151155A (en) * | 1989-11-07 | 1991-06-27 | Keihin Seiki Mfg Co Ltd | Vacuum die casting device |
JPH03151154A (en) * | 1989-11-07 | 1991-06-27 | Keihin Seiki Mfg Co Ltd | Vacuum die casting device |
JPH03230855A (en) * | 1990-02-05 | 1991-10-14 | Yamazaki Kosakusho:Kk | Vacuum casting method in die casting |
JPH0647162B2 (en) * | 1990-11-08 | 1994-06-22 | 株式会社京浜精機製作所 | Vacuum die casting equipment |
WO1993007977A1 (en) * | 1991-10-25 | 1993-04-29 | Toyota Jidosha Kabushiki Kaisha | Device and method of vacuum casting |
DE29818994U1 (en) * | 1998-11-02 | 1999-01-14 | Wieser, Friedrich, 97816 Lohr | Device for vacuum injection molding of metal |
-
1999
- 1999-04-01 DE DE19914830A patent/DE19914830A1/en not_active Withdrawn
-
2000
- 2000-02-21 AU AU25312/00A patent/AU2531200A/en not_active Abandoned
- 2000-02-21 DK DK00903480T patent/DK1165274T3/en active
- 2000-02-21 ES ES00903480T patent/ES2185566T3/en not_active Expired - Lifetime
- 2000-02-21 EP EP00903480A patent/EP1165274B1/en not_active Expired - Lifetime
- 2000-02-21 DE DE50000870T patent/DE50000870D1/en not_active Expired - Fee Related
- 2000-02-21 WO PCT/CH2000/000093 patent/WO2000059658A1/en active IP Right Grant
- 2000-02-21 AT AT00903480T patent/ATE228906T1/en not_active IP Right Cessation
- 2000-02-21 US US09/937,873 patent/US6997231B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0059658A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE228906T1 (en) | 2002-12-15 |
ES2185566T3 (en) | 2003-05-01 |
DE50000870D1 (en) | 2003-01-16 |
US6997231B1 (en) | 2006-02-14 |
AU2531200A (en) | 2000-10-23 |
DE19914830A1 (en) | 2000-10-05 |
WO2000059658A1 (en) | 2000-10-12 |
EP1165274B1 (en) | 2002-12-04 |
DK1165274T3 (en) | 2003-03-24 |
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