EP1706515A1 - Mischvorrichtung - Google Patents
MischvorrichtungInfo
- Publication number
- EP1706515A1 EP1706515A1 EP05700317A EP05700317A EP1706515A1 EP 1706515 A1 EP1706515 A1 EP 1706515A1 EP 05700317 A EP05700317 A EP 05700317A EP 05700317 A EP05700317 A EP 05700317A EP 1706515 A1 EP1706515 A1 EP 1706515A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixing device
- sprue
- channel
- elevation
- mixing
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/005—Casting metal foams
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
- C22C1/083—Foaming process in molten metal other than by powder metallurgy
- C22C1/086—Gas foaming process
Definitions
- the invention relates to a mixing device, in particular for mixing light metal melts with powdery or granular substances, preferably for mixing aluminum melt with a blowing agent.
- a powder of a copper alloy is filled into a wire and this is then fed to a molten metal mass.
- a powdery or granular substance is dosed from a container into a molten metal, the container having a part tapering downwards, at the bottom of which at least one nozzle and above it an ejector are provided.
- the nozzle is connected to a carrier gas line and the ejector is connected to a mixture transport line.
- a gas stream is passed continuously and independently of solids into a mixing chamber.
- the solids are carried into the interior of a molten metal by the gas jet serving as a blowing agent, a rotational movement being generated between the feed line and the molten metal.
- DE-A-3612613 teaches a device in which a channel for molten pig iron has blowing nozzles or blowing stones.
- the invention has for its object to provide a mixing device which enables an efficient mixing of a powdery blowing agent with an aluminum melt shortly before or during the filling of the melt in a die casting tool.
- the problem is solved with the features of the claim.
- the invention is based on the knowledge that for the production of foamed metal bodies, in particular of integral foam, for example according to WO-A-02/060621, the blowing agent is uniform during the filling process distribute in the melt and achieve a complete foaming in the mold. This is achieved with the sprue channel designed according to the invention with mixing elements in a one-step mixing and foaming process.
- the mixing element is constructed in several stages and can be adapted to different volumes.
- the sprue channel is provided with an increase or narrowing, at which a dynamic pressure is created, followed by a pressure drop.
- the increase can be made over the entire width (inner diameter) of the sprue or only partially filling.
- the propellant is preferably added to the liquid light metal stream by means of a hydraulic cylinder in the sprue with at least one pin, preferably in the center of the sprue. At least one additional chicane can follow the increase or decrease.
- the elements of the mixing device and the redistribution in the molten metal stream cause the blowing agent to be sufficiently distributed in the metal stream.
- the powdery or granular materials can also other metals or ceramic particles and. a. include.
- a better process stability is achieved by the propellant supply by means of a mixer in terms of path and time depending on the semolina piston path.
- the mixer elements are interchangeable as wear parts.
- the invention is described in more detail in an exemplary embodiment with reference to a drawing.
- the drawing shows the mixing device in a sprue.
- a sprue 1 of a die-casting mold is provided with an elevation 4 on the inside, which causes a narrowing of the cross section and thus a dynamic pressure.
- the elevation 4 three pin channels 2 open into the sprue channel.
- two baffles 6 follow at a distance from the increase 4.
- the flow rate of the melt flow is high according to the method.
- the dynamic pressure at the elevation 4 is followed by a pressure drop between the elevation 4 and the baffles 6.
- the propellant in the pin channels 2 is preferably injected into the melt stream simultaneously by means of a cylinder 3.
- the pin channels 2 have an inner diameter depending on the size of the part to be cast.
- the pin channels 2 can be arranged side by side or offset from one another.
- the middle part 10 of the sprue 1 can be designed as an easily replaceable wear part.
- the elevation 4 is designed as a hump or ramp, depending on the design of the elevation 4, the melt flow can flow left or right or over it.
- the different flow rates promote the mixing of the melt with the blowing agent.
- Automatic corrections can be implemented during the injection process on the casting profile and the retraction of the cylinder (s) 3 with propellant.
- the metal front is detected by a sensor in the casting channel and converted into a signal, this signal serves as the basis for the automatic corrections for the casting profile and retraction of the cylinder (s) 3, regardless of the amount of metal that is filled.
- the same sensor signal is used to end the press-in process before the cavity is 100% full.
- the signals can be placed on the casting diagram for visualization and checked there and can thus be assigned to a casting piston waypoint.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Continuous Casting (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004003743A DE102004003743A1 (de) | 2004-01-23 | 2004-01-23 | Mischvorrichtung |
PCT/CH2005/000022 WO2005071122A1 (de) | 2004-01-23 | 2005-01-18 | Mischvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1706515A1 true EP1706515A1 (de) | 2006-10-04 |
EP1706515B1 EP1706515B1 (de) | 2007-07-18 |
Family
ID=34745095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05700317A Not-in-force EP1706515B1 (de) | 2004-01-23 | 2005-01-18 | Mischvorrichtung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1706515B1 (de) |
AT (1) | ATE367454T1 (de) |
DE (2) | DE102004003743A1 (de) |
ES (1) | ES2289686T3 (de) |
WO (1) | WO2005071122A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007001780A1 (de) | 2007-01-05 | 2008-07-10 | Bühler Druckguss AG | Verfahren zur Herstellung von faserverstärkten Druckgiessteilen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1164102B (de) * | 1956-03-19 | 1964-02-27 | Lor Corp | Verfahren zur Herstellung von Metallschaumkoerpern |
DE10104339A1 (de) * | 2001-02-01 | 2002-08-08 | Goldschmidt Ag Th | Verfahren zur Herstellung von Metallschaum und danach hergestellter Metallkörper |
DE10104338A1 (de) * | 2001-02-01 | 2002-08-08 | Goldschmidt Ag Th | Herstellung flächiger, metallischer Integralschäume |
-
2004
- 2004-01-23 DE DE102004003743A patent/DE102004003743A1/de not_active Withdrawn
-
2005
- 2005-01-18 WO PCT/CH2005/000022 patent/WO2005071122A1/de active IP Right Grant
- 2005-01-18 DE DE502005001055T patent/DE502005001055D1/de active Active
- 2005-01-18 AT AT05700317T patent/ATE367454T1/de active
- 2005-01-18 EP EP05700317A patent/EP1706515B1/de not_active Not-in-force
- 2005-01-18 ES ES05700317T patent/ES2289686T3/es active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2005071122A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2289686T3 (es) | 2008-02-01 |
DE502005001055D1 (de) | 2007-08-30 |
ATE367454T1 (de) | 2007-08-15 |
EP1706515B1 (de) | 2007-07-18 |
DE102004003743A1 (de) | 2005-08-11 |
WO2005071122A1 (de) | 2005-08-04 |
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