EP0293412B1 - Giesstrichter für geschmolzene metalle - Google Patents

Giesstrichter für geschmolzene metalle Download PDF

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Publication number
EP0293412B1
EP0293412B1 EP87907410A EP87907410A EP0293412B1 EP 0293412 B1 EP0293412 B1 EP 0293412B1 EP 87907410 A EP87907410 A EP 87907410A EP 87907410 A EP87907410 A EP 87907410A EP 0293412 B1 EP0293412 B1 EP 0293412B1
Authority
EP
European Patent Office
Prior art keywords
molten metal
casting
filter
funnel
pouring
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
EP87907410A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0293412A1 (de
Inventor
Jerry W. Brockmeyer
Leonard S. Aubrey
James E. Dore
Clifford N. Soble
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
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 Alusuisse Lonza Services Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to AT87907410T priority Critical patent/ATE59989T1/de
Publication of EP0293412A1 publication Critical patent/EP0293412A1/de
Application granted granted Critical
Publication of EP0293412B1 publication Critical patent/EP0293412B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/086—Filters

Definitions

  • the invention relates to a device for casting molten metal, comprising a pouring hopper for molten metal and transfer devices connected to this pouring hopper to bring the molten metal from this pouring hopper to a casting station.
  • the pressure build-up in the system leads to a reduction in the filling rate when filling the mold cavity.
  • the hollow mold is not completely filled during casting, resulting in incorrect filling and reject material.
  • the filling time is delayed, which can also lead to casting defects, such as wrinkles, poor filling in zones with fine details or too thin sections. This is a problem that can cause expensive rework or even total uselessness of the piece.
  • foam filters are described, for example, in US Pat. No. 4,177,066 arranged in a degassing device for molten metal, the device including a funnel-like reaction chamber and a transfer device arranged underneath.
  • the device comprises a pouring funnel for molten metal, transfer devices connected to the pouring funnel to transfer the molten metal from the pouring funnel, the pouring funnel containing a filter device which is arranged in the region of the open base part in such a way that all the molten metal has to pass through the filtering device to the casting station to bring and is characterized in that the pouring funnel has at least one venting device at the connection point between the pouring funnel and the transfer device.
  • the pouring funnel has a top part open to fill the molten metal and a bottom part open to the transfer device, the bottom part having a smaller cross section than the top part and the cross section narrowing from the top part to the bottom part.
  • a filter insert for molten metal preferably a ceramic foam filter as described above, can be placed in the pouring funnel.
  • the filter insert is preferably used in the region of the base part in such a way that the entire stream of molten metal has to pass through the filter and this results in extensive final removal of the solids.
  • a reshaping peripheral seal surrounding the filter may be provided. The filter insert is thus sealed in relation to the pouring funnel in order to prevent the molten metal from passing through the filter.
  • a plurality of ventilation devices can be provided which improve the escape of trapped air.
  • Figure 1 shows a schematic side view of a typical metal casting process.
  • a typical casting operation with molten metal is shown schematically in Figure 1.
  • a supply 10 of molten metal 11 can, for example, be poured in from above, as shown.
  • a floor pouring or a pouring directly from the melting furnace can also be provided.
  • the pouring funnel 12 is filled from the supply 10 of molten metal and serves as a reservoir with molten metal for the transfer device 13, which in turn is connected to the pouring funnel.
  • the molten metal transfer device 13 may consist of a sprue or channels 14 leading to one or more troughs 15 and ultimately serving the pouring opening or a plurality of pouring openings (not shown).
  • the arrangement, size and number of each of these elements will vary from casting to casting.
  • the mold fill rate as a function of time is shown schematically in Figure 2, which shows the initial time delay (A) due to the metallostatic supernatant, followed by an increase in the mold fill rate until the strong pressure increase in the mold leads to a decrease in the mold fill rate (B).
  • the mold filling rate can then either level (C), continue to fall, stop completely, or increase further if the pressure can escape.
  • the problem of insufficient mold filling rate can be exacerbated if there is a constriction in the system or a ceramic foam filter.
  • FIG. 3A shows the pouring funnel 12 with an upper part 12a which is open at the top and which receives the molten metal and a lower open part 12b with a smaller cross section than the upper part.
  • the pouring funnel 12 narrows from the upper part 12a to the bottom part 12b.
  • a ceramic foam filter 20 is arranged in the area of the base part 12b in the pouring funnel. The filter lies in the flow of the molten metal, so that the entire amount of the molten metal has to pass through the ceramic foam filter for particle removal.
  • the ceramic foam filter according to FIG. 3A is described in its kind in the already mentioned US Pat. No. 3,962,081.
  • the constriction which the filter embodies can also be another restriction of the melt flow, e.g. another filter, a sieve or a constriction in the flow cross-section.
  • a reshaping edge seal 21 is provided, surrounding the filter 20. The purpose of the seal is to seal the filter against the pouring funnel in order to prevent metal from passing through the outside of the filter and to ensure that all molten metal flows through the filter and to ensure a sealed filter installation.
  • a reshaping seal is particularly advantageous because it eliminates filter installation problems due to size and dimension changes due to thermal expansion between the filter and the funnel, which results in high mechanical stress on the filter or funnel components or both.
  • the choice of the special seal depends on the application, e.g.
  • pure oxide fiber such as zirconium oxide or aluminum oxide fiber is best suited for high-temperature applications, such as steel filtration, while aluminosilicate fibers, for example, are particularly suitable for lower temperatures.
  • a filter that is bevelled in the edge area, matching the pouring funnel contour, is preferred for easy installation.
  • the vent 30 according to the invention is provided on the pouring funnel 12.
  • the vent is arranged inside the wall of the pouring funnel and extends through the pouring funnel base 12b in order to establish the connection to the sprue.
  • a vent 30 is provided in the form of one or more continuous pipe sections, attached to or integrated in the surface on the inside of the pouring funnel 12.
  • Figure 3C shows a vent 30, formed by one or more continuous pipe sections, attached to or integrated into the surface, on the outside of the pouring funnel 12, in order to be connected to the sprue.
  • the embodiment of Figure 3B uses a ceramic filter 20a made of an extruded ceramic material, while Figure 3C uses a ceramic foam filter 20, as in Figure 3A. In both cases, a sealing material 21 is applied laterally on the edge of the filter body.
  • Figures 4A and 4B show improved pouring funnels 16 comprising an open top 16a and an open bottom 16b, wherein the bottom has a smaller diameter than the top.
  • the open bottom portion 16b includes an inward seam 17 which is provided as a supporting or supporting surface for the filter 20a of the type made of extruded ceramic material.
  • Figure 4A comprises a pouring funnel with a substantially vertical bottom part 18 for the simple arrangement of a substantially rectangular filter, while Figure 4B shows a pouring funnel with a sloping wall, as shown in Figure 3.
  • Figure 5 is a top view of a pouring funnel 12 with 4 outer notches 30 as ventilation devices.
  • the exact number of ventilation devices will vary according to the demands made on the pouring funnel.
  • the notches can be filled with wax, which later melts away after the mold has been formed.
  • a precision casting vent can be formed by attaching wax to the funnel surface before the mold is formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Laminated Bodies (AREA)
EP87907410A 1986-12-15 1987-11-26 Giesstrichter für geschmolzene metalle Expired - Lifetime EP0293412B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87907410T ATE59989T1 (de) 1986-12-15 1987-11-26 Giesstrichter fuer geschmolzene metalle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US941809 1986-12-15
US06/941,809 US4708326A (en) 1986-12-15 1986-12-15 Vented pouring cup for molten metal casting

Publications (2)

Publication Number Publication Date
EP0293412A1 EP0293412A1 (de) 1988-12-07
EP0293412B1 true EP0293412B1 (de) 1991-01-16

Family

ID=25477094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87907410A Expired - Lifetime EP0293412B1 (de) 1986-12-15 1987-11-26 Giesstrichter für geschmolzene metalle

Country Status (11)

Country Link
US (1) US4708326A (enrdf_load_stackoverflow)
EP (1) EP0293412B1 (enrdf_load_stackoverflow)
JP (1) JPH01501457A (enrdf_load_stackoverflow)
CN (1) CN87107434A (enrdf_load_stackoverflow)
AT (1) ATE59989T1 (enrdf_load_stackoverflow)
AU (1) AU600053B2 (enrdf_load_stackoverflow)
DE (1) DE3767485D1 (enrdf_load_stackoverflow)
DK (1) DK448488A (enrdf_load_stackoverflow)
ES (1) ES2005728A6 (enrdf_load_stackoverflow)
NO (1) NO883628L (enrdf_load_stackoverflow)
WO (1) WO1988004587A1 (enrdf_load_stackoverflow)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU601315B2 (en) * 1988-01-30 1990-09-06 Foseco International Limited Moulds for metal casting and sleeves containing filters for use therein
GB8815140D0 (en) * 1988-06-24 1988-08-03 Flogates Ltd Submerged pouring
US5202081A (en) * 1990-04-17 1993-04-13 Rolls-Royce Plc Launder system for supplying molten metal and a launder nozzle
USD322615S (en) 1991-02-01 1991-12-24 Foseco International Limited Tundish insert
US5333844A (en) * 1992-09-25 1994-08-02 Martin Marietta Energy Systems, Inc. Non-graphite crucible for high temperature applications
US5482257A (en) * 1992-09-25 1996-01-09 Martin Marietta Energy Systems, Inc. Non-graphite crucible for high temperature applications
AU733266B2 (en) * 1997-02-26 2001-05-10 Selee Corporation Dual stage ceramic foam filtration system and method
US5673902A (en) * 1996-02-01 1997-10-07 Selee Corporation Dual stage ceramic foam filtration system and method
US5879721A (en) * 1996-08-28 1999-03-09 Ebaa Iron, Inc. Movable pouring basin
US5691259A (en) * 1996-11-08 1997-11-25 Fiber Ceramics, Inc. Process of making a self sintering ceramic composition
CN1351526A (zh) * 1999-05-18 2002-05-29 福塞科国际有限公司 过滤器组件
US20110084430A1 (en) * 2009-03-27 2011-04-14 Hitchings Jay R Contoured Molten Metal Filter Cups
US20110049197A1 (en) * 2009-08-06 2011-03-03 Paul Anthony Withey Liquid device having filter
US9315426B2 (en) 2010-05-20 2016-04-19 Comanche Tecnologies, LLC Coatings for refractory substrates
CN103203431B (zh) * 2013-05-04 2015-05-06 日月重工股份有限公司 铸造用过滤器
CN104209465A (zh) * 2013-05-29 2014-12-17 贵阳市新航铸造材料科技开发有限公司 熔模铸造用陶瓷浇口杯的制造方法
GB201313849D0 (en) * 2013-08-02 2013-09-18 Castings Technology Internat Producing a metal object
DE102015101913B3 (de) * 2015-02-10 2016-05-12 Foseco International Limited Eingussspeiser mit integriertem losen Filter, Gusssystem bestehend aus dem Eingussspeiser und einem Formmodell und Verfahren zur Herstellung einer Gussform
DE102015101912A1 (de) 2015-02-10 2016-08-11 Foseco International Limited Eingussspeiser mit integriertem losen Filter, Gusssystem bestehend aus dem Eingussspeiser und einem Formmodell und Verfahren zur Herstellung einer Gussform sowie Gussverfahren unter Verwendung dieses Gusssystems
US11141780B2 (en) * 2015-10-14 2021-10-12 Aleris Rolled Products Germany Gmbh Method and device for casting metal alloy ingots
DE102017119443B3 (de) 2017-08-24 2018-10-11 Foseco International Limited Eingussspeiser mit integriertem Filter

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR485095A (fr) * 1917-04-14 1917-12-11 Dragomir Palyitch Procédé de remplissage des moules et des corps creux au moyen de matières fondues et appareils pour sa réalisation
FR1482983A (fr) * 1966-04-19 1967-06-02 Berliet Automobiles Godet de coulée pour moules de fonderie
US3516478A (en) * 1967-12-05 1970-06-23 Monsanto Co Apparatus for separation of impurities from metal melts in a filament spinning device
JPS5299284A (en) * 1976-02-13 1977-08-19 Toray Ind Inc Cell culturing device
US4179102A (en) * 1978-06-12 1979-12-18 Swiss Aluminium Ltd. Apparatus for the degassing and filtration of molten metal
US4177066A (en) * 1978-06-12 1979-12-04 Swiss Aluminium Ltd. Method and apparatus for the removal of impurities from molten metal
GB2047139B (en) * 1979-04-20 1983-05-18 Jeanneret M Mould gating system
JPS58500434A (ja) * 1981-03-27 1983-03-24 ゲオルク　フイツシヤ−　アクチエンゲゼルシヤフト セラミツクフイルタ、その製造方法及び使用方法
JPS5811494A (ja) * 1981-07-15 1983-01-22 株式会社東芝 昇降物体の落下防止装置
US4572486A (en) * 1982-07-14 1986-02-25 Metcast Associates, Inc. Molten metal filtering vessel with internal filter
JPS5925587U (ja) * 1982-08-09 1984-02-17 三洋電機株式会社 発光ダイオ−ド装置
US4591383A (en) * 1982-09-30 1986-05-27 Corning Glass Works Apparatus and method of filtering molten metal using honeycomb structure of sintered alumina as filter element
DE3370593D1 (en) * 1982-09-30 1987-05-07 Corning Glass Works Improved alumina molten metal filters
US4494985A (en) * 1983-01-07 1985-01-22 Allied Corporation Filtration of inclusions from molten metal alloy
US4546812A (en) * 1983-09-30 1985-10-15 Tiegel Manufacturing Company Method and apparatus for improving the densities of cast parts
US4637593A (en) * 1985-08-09 1987-01-20 Yinko Sr Richard H Ladle cup for pouring molten metal

Also Published As

Publication number Publication date
DK448488D0 (da) 1988-08-10
DE3767485D1 (de) 1991-02-21
WO1988004587A1 (en) 1988-06-30
DK448488A (da) 1988-08-10
ES2005728A6 (es) 1989-03-16
US4708326A (en) 1987-11-24
AU600053B2 (en) 1990-08-02
AU8233287A (en) 1988-07-15
CN87107434A (zh) 1988-06-29
EP0293412A1 (de) 1988-12-07
JPH0356145B2 (enrdf_load_stackoverflow) 1991-08-27
JPH01501457A (ja) 1989-05-25
NO883628D0 (no) 1988-08-15
NO883628L (no) 1988-08-15
ATE59989T1 (de) 1991-02-15

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