EP0317500A1 - Vorrichtung zum Giessen von geschmolzenem Metall - Google Patents

Vorrichtung zum Giessen von geschmolzenem Metall Download PDF

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Publication number
EP0317500A1
EP0317500A1 EP88810737A EP88810737A EP0317500A1 EP 0317500 A1 EP0317500 A1 EP 0317500A1 EP 88810737 A EP88810737 A EP 88810737A EP 88810737 A EP88810737 A EP 88810737A EP 0317500 A1 EP0317500 A1 EP 0317500A1
Authority
EP
European Patent Office
Prior art keywords
filter
molten metal
casting
metal
inlet
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.)
Withdrawn
Application number
EP88810737A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jerry W. Brockmeyer
Michael A. Cummings
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 Holdings AG
Schweizerische Aluminium AG
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 Holdings AG, Schweizerische Aluminium AG, Alusuisse Lonza Services Ltd filed Critical Alusuisse Holdings AG
Publication of EP0317500A1 publication Critical patent/EP0317500A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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.
  • Increasing casting methods usually make use of a conventional casting and a variety of casting molds as well as feeds from the casting to the casting molds.
  • the filter can be placed in a small pouring trough between the pouring ladle and the head of the sprue.
  • Another arrangement option namely placing the filter directly upstream on the casting block, offers advantages.
  • An object of the present invention is to provide an apparatus for casting molten metal using a filter and using the increasing casting method.
  • Another object of the present invention is to provide a device of the aforementioned type which enables the filter to be filled normally and which reduces the mechanical stress on the filter and therefore the possibility of the filter breaking.
  • a still further object of the present invention is to provide a device of the aforementioned kind which is simple, expedient and quick to handle on a production scale.
  • the apparatus of the present invention includes a mold for casting molten metal with a bottom part, a filter which is in the gate transversely to the flow of the liquid metal so that all the molten metal has to pass through the filter, and a trough below said inlet and filters.
  • devices are provided that hold the filter in place. These devices advantageously contain a carrier plate with a ring which extends over the entire sprue above the filter and has at least one passage for the flow of the molten metal. Several passages are advantageously arranged at intervals in the ring.
  • a plurality of said molds are provided with a conventional sprue and with feeds from the inlet to each mold.
  • the trough usually has a volume that is between twice and less than ten times the filter volume.
  • a preferred embodiment contains a curved inlet channel for the liquid metal in order to cause the metal melt to swirl.
  • a metal foil which has a lower melting point than the molten metal, is attached under said filter.
  • a typical molten metal casting device is shown schematically in FIG. 1, a source 10 of molten metal 11 being provided, which molten metal 11 can be poured from above as shown, from the ladle bottom or directly from the furnace.
  • the source 10 of the molten metal 11 is located above the pouring funnel 12, which then serves as a filler neck and forms a reservoir for the molten metal transfer units or for the sprue 13 which is in direct connection with the pouring funnel 12.
  • the metal melt transfer units can consist of a gate 13 or a plurality of gates 13, which leads to one or more feeds 14, which ultimately supply the casting mold (s) 15 with melt.
  • a plurality of such molds 15 and feeders 14 are usually arranged radially from a common inlet 13.
  • Fig. 2 shows five molds 15 with feeders 14.
  • a plurality of such feeders 14 and molds 15 are provided, e.g. 3 to 8.
  • FIG. 2 is an enlarged detailed view of such a feed 14 leading directly to the casting molds 15.
  • the feed 14 leads to the feed inlet 20, which adjoins the tub 21 directly.
  • the casting mold 15 is provided with a base part 22, which contains a molten metal inlet 23.
  • a filter 24 is securely mounted in its position over the molten metal inlet 23 in such a way that the entire molten metal flows through the Filter 24 must run.
  • the position of the filter 24 can be secured by cementing or by attached flanges with appropriate seals, if necessary.
  • a filter 24 of sufficient strength to withstand the loads must be used.
  • the filter material must also be resistant to the metal used.
  • Arrangements 30 are advantageously attached to said inlet 23 in order to hold the filter 24 in the predetermined position.
  • these arrangements contain a carrier plate 30 with a ring extending over the inlet 23 with at least one passage 31 or 32 for the molten metal.
  • a multiplicity of passages 31 are advantageously present.
  • said ring is provided both with a central passage 32 and with passages 31 arranged in a circle around it.
  • the carrier plate 30 is provided in order to prevent mechanical damage to the filter due to high heat influences.
  • the carrier plate 30 does not limit the usability of the filter 24 underneath, but only provides support in order to prevent damage to the same.
  • a deeper melting metal foil 40 can be attached to the inlet side 41 of the filter 24, as shown in FIG. 5.
  • a foil 40 made of a nickel alloy can be used. The molten metal melts the film 40 and forms a deeper melting alloy, which thus enables the filter 24 to be filled.
  • the feed inlet 20a contains a circumferential channel 25 for the metal flow to the trough 21 in order to generate turbulence of the melt.
  • a further embodiment is shown in FIG. 6.
  • the feed 14a can extend below the trough 21 and laterally beyond it in order to generate turbulence and also to obtain a larger reservoir of molten metal below the filter 24.
  • the tub 21 should have at least twice the volume of the filter 24.
  • the upper limit of the volume of the tub 21 is not particularly critical, but a volume of the tub 21 below ten times the volume of the filter 24 is preferred.
  • tubs 21 with a depth of 5 to 25 cm are suitably used with filters with a depth of 2.5 to 3.75 cm.
  • the usual pouring funnel was approx. 300 cm high and had a diameter of 10 cm.
  • the diameter of the tub was 20 cm.
  • the filter which was placed at the top of the tub and in the molten metal inlet to the casting block, had a diameter of 20 cm and was 3.75 cm thick.
  • the filter was a ceramic foam filter based on ZrO2-Al2O3 ceramic with a pore size of approximately 5 ppi (pores per inch).
  • the furnace was tapped at a temperature of 1567 ° C.
  • the filter took 15 seconds to fill.
  • the bar shape was completely filled within 85 seconds, which corresponds to 0.118 kg / cm 2 seconds. Filling the filter was quick, as was filling the ingot shape, resulting in a good quality inclusion-free ingot.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP88810737A 1987-11-16 1988-10-27 Vorrichtung zum Giessen von geschmolzenem Metall Withdrawn EP0317500A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/121,634 US4802527A (en) 1987-11-16 1987-11-16 Apparatus for casting molten metal
US121634 2002-04-12

Publications (1)

Publication Number Publication Date
EP0317500A1 true EP0317500A1 (de) 1989-05-24

Family

ID=22397902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810737A Withdrawn EP0317500A1 (de) 1987-11-16 1988-10-27 Vorrichtung zum Giessen von geschmolzenem Metall

Country Status (8)

Country Link
US (1) US4802527A (es)
EP (1) EP0317500A1 (es)
JP (1) JPH01215458A (es)
CN (1) CN1033249A (es)
AR (1) AR240412A1 (es)
AU (1) AU2519888A (es)
BR (1) BR8805929A (es)
ZA (1) ZA888390B (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453079A1 (en) * 1990-04-17 1991-10-23 ROLLS-ROYCE plc A launder system for supplying molten metal and a launder nozzle

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5202081A (en) * 1990-04-17 1993-04-13 Rolls-Royce Plc Launder system for supplying molten metal and a launder nozzle
US5104540A (en) * 1990-06-22 1992-04-14 Corning Incorporated Coated molten metal filters
US5390723A (en) * 1992-03-09 1995-02-21 Mohla; Prem P. Method of treating casting metals
US6619373B1 (en) * 2002-04-25 2003-09-16 General Motors Corporation Lost foam casting apparatus for reducing porosity and inclusions in metal castings
US6845810B2 (en) * 2002-10-11 2005-01-25 General Motors Corporation Lost-foam casting apparatus for improved recycling of sprue-metal
ATE463313T1 (de) * 2004-02-24 2010-04-15 Alcan Int Ltd Verfahren zur vorbereitung eines filters für metallschmelze
JP5742014B2 (ja) * 2011-05-16 2015-07-01 日立金属株式会社 柱状インゴットの鋳造装置および柱状インゴットの製造方法
CN106001428B (zh) * 2016-06-29 2018-05-08 共享装备股份有限公司 过滤网支撑座、浇注系统及浇注方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR584125A (fr) * 1923-07-19 1925-01-30 Système applicable en fonderie de coulée comportant un filtre prisonnier adhérant à la pièce
FR2355588A1 (fr) * 1976-02-06 1978-01-20 Renault Systeme de coulee de pieces de fonderie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2226233B1 (es) * 1973-04-20 1976-11-12 Renault
JPS5486438A (en) * 1977-12-22 1979-07-10 Kobe Steel Ltd Production of clean steel
US4413813A (en) * 1980-10-24 1983-11-08 Olin Corporation Disposable bed filter apparatus
CH655328A5 (de) * 1984-02-15 1986-04-15 Fischer Ag Georg Keramikfilter.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR584125A (fr) * 1923-07-19 1925-01-30 Système applicable en fonderie de coulée comportant un filtre prisonnier adhérant à la pièce
FR2355588A1 (fr) * 1976-02-06 1978-01-20 Renault Systeme de coulee de pieces de fonderie

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 12, Nr. 222 (M-712)[3069], 24. Juni 1988; & JP-A-63 20 147 (RYOBI LTD) 27-01-1988 *
SOVIET INVENTIONS ILLUSTRATED, Woche 8528, 22. August 1985, Sektion CH, Klasse M, Nr. 85-169919/28, Derwent Publications LTD, London, GB; & SU-A-1 130 436 (AS UKR CASTING PROBLEMS) 23-12-1984 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453079A1 (en) * 1990-04-17 1991-10-23 ROLLS-ROYCE plc A launder system for supplying molten metal and a launder nozzle

Also Published As

Publication number Publication date
US4802527A (en) 1989-02-07
AR240412A1 (es) 1990-04-30
JPH0251709B2 (es) 1990-11-08
JPH01215458A (ja) 1989-08-29
AU2519888A (en) 1989-05-18
BR8805929A (pt) 1989-08-01
CN1033249A (zh) 1989-06-07
ZA888390B (en) 1989-08-30

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