EP1819465A1 - Vakuumdruckgussverfahren - Google Patents
VakuumdruckgussverfahrenInfo
- Publication number
- EP1819465A1 EP1819465A1 EP05813648A EP05813648A EP1819465A1 EP 1819465 A1 EP1819465 A1 EP 1819465A1 EP 05813648 A EP05813648 A EP 05813648A EP 05813648 A EP05813648 A EP 05813648A EP 1819465 A1 EP1819465 A1 EP 1819465A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- vacuum
- phase
- casting chamber
- piston
- 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
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000004512 die casting Methods 0.000 title claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 125
- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 47
- 230000008569 process Effects 0.000 claims abstract description 22
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 150000002739 metals Chemical class 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 abstract description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 229910001338 liquidmetal Inorganic materials 0.000 description 5
- 244000261422 Lysimachia clethroides Species 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010118 rheocasting Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009716 squeeze casting Methods 0.000 description 1
- 238000010117 thixocasting Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
- B22D17/04—Plunger machines
Definitions
- Die casting under vacuum has been used for some time in the production of moldings of metals and metal alloys, especially for alloys of metals Al, Mg, Zn and Cu.
- die casting under vacuum a higher material quality of the parts is achieved because less air and gases are trapped in the material.
- moldings of e.g. Aluminum which should later be subjected to a heat treatment or welded, can hardly be dispensed with vacuum.
- die casting under vacuum is not only possible with the use of liquid metal alloys, but can also be used in derived special processes. As examples can be mentioned here:
- thixo or rheo-casting Process using partially liquid or doughy material as casting material (commonly referred to as thixo or rheo-casting), process wherein the casting compound consists of a material combination (composite) of liquid or semi-liquid metals and non-metallic inclusions (MMC) and method wherein a preform is infiltrated with liquid material.
- MMC non-metallic inclusions
- Inlet pipe is in communication. Through a generated in the mold and casting chamber and precisely controlled vacuum we sucked and metered metal in the casting chamber.
- the vacuum system for such DruckgitRIS consists essentially of a vacuum pump brought to negative pressure buffer tank. Sometimes a vacuum pump is directly connected, sometimes a central vacuum system is used. Furthermore, such vacuum systems still include intermediate valves and filters and pressure gauges.
- Document DE-OS 19645 104 describes a technique which allows lower vacuum values to be achieved in the mold cavity of the mold by successively connecting the mold cavity to two different vacuum buffer containers without the containers themselves ever being allowed to be connected to one another. This method also allows to increase process stability and monitor the process over the ultimate pressures of the containers.
- the vacuum is created via a vent valve attached to the mold.
- the mold can be brought to negative pressure only after the casting piston has exceeded the filling opening during the "first casting phase" and thus the connection to the outside atmosphere has been interrupted.
- the process time remaining after exceeding is generally insufficient to equalize the pressure between the mold cavity and the buffer container.
- the vacuum achieved is further worsened by the narrow cross-sections of the venting valve and the connecting channels that run from the mold cavity to the vent valve in the mold, as well as any constrictions in the mold cavity itself In particular, between casting piston and casting chamber, to worse and fluctuating vacuum values.
- the leaks also vary greatly with the wear of the piston and the casting chamber and depend on the temperature ur.
- Vacuum pressure casting are under vacuum and thereby leaks gain in importance.
- the object of the invention is therefore to provide an improved Druckg cardclar in which larger ventilation cross-sections are possible, so that a lower vacuum is achieved.
- the requirements for the piston and the molds with respect to vacuum tightness should be reduced.
- the dosing accuracy in the filling of the casting chamber with metal or metal alloy should be increased.
- This object is achieved by a method for die casting of metals or metal alloys, which form the casting material (8), wherein the process takes place under the application of vacuum. It comprises the steps: a filling of the casting chamber (6) with the casting compound (8) b sealing of the casting chamber (6) against the atmosphere, wherein the steps a and b can be reversed, and is characterized in that after sealing and separating the G manttingraums (5) from the atmosphere a first vacuum phase is performed and after separation of the casting chamber space (5) from the first supply line to the vacuum system (12) a second or further vacuum phases are performed.
- the further claims constitute further embodiments.
- the object is also achieved hot chamber pressure casting method, wherein a vacuum system is provided with at least two vacuum supply lines, comprising the steps: 1) moving a casting piston, so that the Einglallöffhung (72) is closed; 2) generating negative pressure in casting container (74), intermediate piece (75), mouthpiece (76) and mold cavity via a first vacuum supply line (12), characterized in that 3) a first vacuum phase is carried out after the casting piston over the filling opening (72) Has; 4) after the connection to the first vacuum supply line (12) is interrupted; 5) then a second vacuum phase is performed.
- the novel process of claim 1 or claim 18 includes at least two vacuum phases in the overall casting cycle in which negative pressure is generated.
- the atmosphere is sucked through the casting chamber.
- This allows to use connections that have much larger cross-sections.
- significantly better conductivity values in the vacuum system and thus a better final pressure are achieved.
- the better conductances allow a reduction in the time of the first phase. Since a better vacuum can be achieved more quickly via the large guide values, it is also possible, in comparison to the method according to EP-OS 0 051 310, to tolerate leaks in the shape and along the piston to a much greater extent.
- the pouring chamber designed in accordance with the invention makes it possible to carry out the metal metering with high accuracy, independently of the vacuum.
- vacuum is generated in a second phase via the mold and thus the final pressure reached is improved.
- This phase takes place when the molten metal space from the supply line to the first phase vacuum system has been separated. This can be done by moving the casting plunger or by closing a valve in the supply line.
- no use is made of a lockable hood.
- the separation of the casting chamber from the outside atmosphere is done by the piston closes the filling opening.
- the The casting chamber is connected to the supply line of the first vacuum phase via a further generously dimensioned opening.
- the first vacuum phase is generated before the piston has covered this second opening.
- the piston may have one or more sealing rings. This embodiment can be implemented without much effort on existing systems.
- the sealing and separation of the casting chamber from the atmosphere may be accomplished by placing the two mold halves against each other, i. the mold is closed. As a result, the number of required components and openings in the casting chamber can be reduced.
- This vacuum system may be an arrangement of vacuum pumps and / or buffer tanks. Vacuum is generated in the first vacuum phase via this first supply line.
- a second supply line (15) with a valve (16) connects the venting valve (14) attached to the mold with the vacuum system (20). Vacuum is generated in the second phase via this second supply line.
- Casting compound (8) is filled in the casting chamber (6).
- the hood (7) is withdrawn and releases the Ein Schollöffhung (4).
- the hood (7) is advanced and closes off the casting chamber space (5) in a vacuum-tight manner.
- On the piston side is sealed with a grommet (2) on the piston rod (1).
- vacuum is generated by the vacuum system via the connection (11), this corresponds to the first vacuum phase.
- This connection can be carried out with a high conductance, since there are practically no spatial restrictions. As a result, mold cavity and casting chamber are evacuated effectively and quickly.
- the piston (3) is advanced, so that at the end of the Ein colllöffhung (4) is closed.
- the phases can also be explained on the basis of the position of the valves (13), (14) and (16).
- the valves are closed. Once the hood (7) is advanced and thus the
- valve (13) is opened, the first vacuum phase takes place.
- valves (14) and (16) are opened (usually valve (14) is already open) and the second vacuum phase takes place.
- valves (14) and (16) close. Most vent valves are closed by the metal itself.
- Another embodiment relates to the filling of the casting chamber with metal. This does not necessarily have to be done before the first vacuum phase. It is conceivable to use a vacuum phase for metering the casting compound by sucking the metal into the casting chamber with the vacuum, for example via a riser.
- the dosing of the casting mass does not have to take place in the first vacuum phase, but can take place in one of the subsequent vacuum phases.
- reaction of the casting compound with the gases in the casting chamber can be reduced because they are reduced in a vacuum phase before filling.
- protective gases or reaction gases are fed into the casting chamber and / or the mold cavity instead of a vacuum phase. This reaction of the casting with gases can be avoided, for example, the oxidation is strongly suppressed at the surface of the casting. It is also possible to introduce gases which specifically react with the casting compound and improve the properties of the material.
- FIG. 4 shows that embodiment in which the casting chamber (5) and the outside atmosphere are separated by means of the casting piston (3).
- Figure 4a shows the step in the process after the liquid metal (8) in the casting chamber (6) has been filled.
- the casting piston (3) has passed over the filling opening (4), the casting chamber space (5) is sealed against the outside atmosphere and a first vacuum phase can be introduced via the direct connection (42) of the first supply line (15) to the casting chamber (6) , This step is shown in Figure 4b. If the valve (13) in the first supply line has been closed or the piston has run over the connection (42), the second vacuum phase can be switched on via the venting valve (14) and the second supply line (15). This state is represented by FIG. 4c.
- the embodiment in FIG. 6 is a solution in which the casting chamber (6) is filled with metal (8) via a metering pot (61). At the same time, the separation between the outside atmosphere and the casting chamber space (5) is produced via the metering pot.
- the metering pot is already filled with metal in a first step (FIG. 6a).
- a first vacuum phase can already be introduced at a very early point in time (FIG. 6b). This happens in this example via the supply line (12) to the first vacuum phase.
- the metering potential space (63) can be independently brought to a certain negative pressure.
- the plug (62) By pulling the plug (62), the metal is metered into the pouring chamber (6) via the filling opening (4). Any existing (positive) pressure difference between dosing spot space (63) and casting chamber space (5) will further accelerate the dosing process.
- another vacuum phase can be initiated immediately.
- FIG. 6d shows a variant of the metering pot (61) with a closable lid (64).
- the lid can be opened after the plug (62) has reliably closed the passage opening. It is advisable to wait with the opening of the lid until the piston (3) has run over the filling opening (4) in order not to endanger the tightness of the casting chamber space (5) via any leaks on the plug (62). Thereafter, the metering pot (61) can be filled again with casting compound (8) at any time.
- Dosierpot (61) instead of a lockable lid (64), also via a lockable tube or a metering piston.
- Dosierpots could also be used in a further embodiment, a shootable dosing or dosing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004057324A DE102004057324A1 (de) | 2004-11-27 | 2004-11-27 | Vakuumdruckgussverfahren |
PCT/EP2005/012503 WO2006056410A1 (de) | 2004-11-27 | 2005-11-23 | Vakuumdruckgussverfahren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1819465A1 true EP1819465A1 (de) | 2007-08-22 |
EP1819465B1 EP1819465B1 (de) | 2013-02-27 |
Family
ID=35825345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05813648A Active EP1819465B1 (de) | 2004-11-27 | 2005-11-23 | Vakuumdruckgussverfahren |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090050289A1 (de) |
EP (1) | EP1819465B1 (de) |
DE (1) | DE102004057324A1 (de) |
WO (1) | WO2006056410A1 (de) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4442598B2 (ja) | 2006-10-12 | 2010-03-31 | トヨタ自動車株式会社 | 減圧鋳造方法、及び、減圧鋳造装置 |
DE112010003048A5 (de) | 2009-09-22 | 2012-06-14 | Ksm Castings Gmbh | Vakuumdruckgussanlage und Verfahren zum Betrieb einer Vakuumdruckgussanlage |
JP2011098379A (ja) * | 2009-11-06 | 2011-05-19 | Sanden Corp | 真空バルブ装置およびそれを用いた真空ダイカスト装置 |
CN101927329B (zh) * | 2010-09-06 | 2012-05-30 | 重庆硕龙科技有限公司 | 一种真空高压铸造方法 |
JP2012170965A (ja) * | 2011-02-18 | 2012-09-10 | Toyota Motor Corp | 減圧鋳造装置 |
CN102950270B (zh) * | 2012-11-09 | 2014-06-18 | 华中科技大学 | 一种压铸用多向抽真空装置 |
US11077607B2 (en) | 2013-10-21 | 2021-08-03 | Made In Space, Inc. | Manufacturing in microgravity and varying external force environments |
US10725451B2 (en) | 2013-10-21 | 2020-07-28 | Made In Space, Inc. | Terrestrial and space-based manufacturing systems |
US10953571B2 (en) * | 2013-11-26 | 2021-03-23 | Made In Space, Inc. | Metal casting methods in microgravity and other environments |
CN106457373A (zh) * | 2014-05-06 | 2017-02-22 | 布勒股份公司 | 用于操作真空压铸机的方法 |
DE112015002609A5 (de) | 2014-06-02 | 2017-02-23 | Ksm Castings Group Gmbh | Gießvorrichtung und Druckgussverfahren |
CN105642862B (zh) * | 2015-12-31 | 2019-08-23 | 宇龙计算机通信科技(深圳)有限公司 | 一种真空压铸设备及方法 |
CN105772638B (zh) * | 2016-05-26 | 2016-12-07 | 长沙金龙铸造实业有限公司 | 一种消失模组型方法 |
ES2631502B1 (es) * | 2016-09-06 | 2018-06-05 | Comercial Nicem-Exinte, S.A - Coniex | Equipo de inyección de metal en molde polimérico, molde polimérico utilizado y procedimiento de funcionamiento del conjunto |
CN106583683B (zh) * | 2016-12-28 | 2019-04-26 | 宁波臻至机械模具有限公司 | 一种双位置加压压铸模 |
CN106623850A (zh) * | 2016-12-28 | 2017-05-10 | 宁波臻至机械模具有限公司 | 一种应用挤压渣包进行局部加压的压铸模 |
US10836108B1 (en) | 2017-06-30 | 2020-11-17 | Made In Space, Inc. | System and method for monitoring and inspection of feedstock material for direct feedback into a deposition process |
HUE051483T2 (hu) * | 2017-08-30 | 2021-03-01 | G A Roeders Holding Gmbh & Co Kg | Nyomás alatti öntõberendezés és eljárás egy dugattyú kenésére |
CN107570677A (zh) * | 2017-09-24 | 2018-01-12 | 广东鸿泰科技股份有限公司 | 一种用于高压压铸工艺的料管抽真空的加工方法 |
CN107737902B (zh) * | 2017-11-29 | 2019-05-14 | 沈阳工业大学 | 用于汽车支架零件的镁合金高致密压铸成型工艺 |
CN110052592A (zh) * | 2018-01-18 | 2019-07-26 | 小出(台州)模具有限公司 | 薄壁件真空压铸模具 |
CN111615434B (zh) * | 2018-09-21 | 2021-09-28 | 本田技研工业株式会社 | 压铸用铸造模具及其减压通道流导设定方法 |
EP4219043A1 (de) | 2022-01-26 | 2023-08-02 | Fundación Azterlan | Vakuumdruckverfahren und vorrichtung zum hochdruckgiessen |
DE102023100620B4 (de) | 2023-01-12 | 2024-08-22 | Thomas Ninkel | Vorrichtung zum Vakuum-Druckgießen und Druckgießmaschine |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2636665C3 (de) * | 1976-08-14 | 1980-08-21 | Walter 8753 Obernburg Reis | Vorrichtung zum Transport einer Metallschmelze von einem Schmelzbad zu einer Druckgießform |
JPS602948B2 (ja) * | 1980-10-27 | 1985-01-24 | 彪 荒井 | 真空ダイカスト成型装置 |
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 |
JPS59144566A (ja) | 1983-02-08 | 1984-08-18 | Ube Ind Ltd | 真空鋳造装置 |
JPS62207554A (ja) | 1986-03-05 | 1987-09-11 | Kozo Kuroki | 真空ダイカスト装置 |
DE4123464A1 (de) * | 1991-07-16 | 1993-01-21 | Audi Ag | Verfahren zum betreiben einer druckgiessmaschine |
DE4239558A1 (de) * | 1992-11-25 | 1994-05-26 | Mueller Weingarten Maschf | Verfahren zur Unterdruck-Herstellung bei einer Druckgießmaschine |
US5860468A (en) * | 1993-07-28 | 1999-01-19 | Cook; Arnold J. | Vacuum die casting |
DE19605727A1 (de) * | 1996-02-16 | 1997-08-21 | Mueller Weingarten Maschf | Vakuum-Druckgießmaschine |
DE19645104B4 (de) | 1996-10-31 | 2007-12-20 | Pfeiffer Vacuum Gmbh | Verfahren zur Durchführung eines Prozesses in einem mit Unterdruck beaufschlagten Prozessraum |
US6070643A (en) * | 1997-09-12 | 2000-06-06 | Howmet Research Corporation | High vacuum die casting |
DE19914830A1 (de) * | 1999-04-01 | 2000-10-05 | Buehler Druckguss Ag Uzwil | Verfahren zum Vakuum-Druckgiessen und Druckgiessform |
DE19925148A1 (de) * | 1999-06-02 | 2000-12-07 | Mueller Weingarten Maschf | Verhinderung der Oxidation der Schmelze bei einer nach einem Vakuumverfahren arbeitenden Druckgießmaschine |
MY130713A (en) * | 2000-01-12 | 2007-07-31 | Nippon Light Metal Co | A die-casting process and a die-casting machine |
JP2002361386A (ja) * | 2001-06-06 | 2002-12-17 | Japan Steel Works Ltd:The | 軽合金射出成形機の不活性ガス供給方法およびその装置 |
JP3900422B2 (ja) | 2002-08-09 | 2007-04-04 | 晃由 梅村 | 真空ダイカスト法における給湯方法及びそれに用いる給湯装置 |
-
2004
- 2004-11-27 DE DE102004057324A patent/DE102004057324A1/de not_active Withdrawn
-
2005
- 2005-11-23 EP EP05813648A patent/EP1819465B1/de active Active
- 2005-11-23 US US11/791,677 patent/US20090050289A1/en not_active Abandoned
- 2005-11-23 WO PCT/EP2005/012503 patent/WO2006056410A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2006056410A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102004057324A1 (de) | 2006-06-01 |
WO2006056410A1 (de) | 2006-06-01 |
US20090050289A1 (en) | 2009-02-26 |
EP1819465B1 (de) | 2013-02-27 |
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