EP0234979A1 - Feuerfester Filter - Google Patents

Feuerfester Filter Download PDF

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Publication number
EP0234979A1
EP0234979A1 EP19870400109 EP87400109A EP0234979A1 EP 0234979 A1 EP0234979 A1 EP 0234979A1 EP 19870400109 EP19870400109 EP 19870400109 EP 87400109 A EP87400109 A EP 87400109A EP 0234979 A1 EP0234979 A1 EP 0234979A1
Authority
EP
European Patent Office
Prior art keywords
holes
perforations
pins
plate
refractory material
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
Application number
EP19870400109
Other languages
English (en)
French (fr)
Other versions
EP0234979B1 (de
Inventor
Jacques Desobeau
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.)
Daussan SAS
Original Assignee
Daussan SAS
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 Daussan SAS filed Critical Daussan SAS
Publication of EP0234979A1 publication Critical patent/EP0234979A1/de
Application granted granted Critical
Publication of EP0234979B1 publication Critical patent/EP0234979B1/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
    • 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 refractory filters made up to now have the drawback of not having a constant passage coefficient; this coefficient, which is most often defined as a function of the number of pores per linear inch or as a percentage of vacuum, in fact varies from one filter to another. The quality of the filtration is therefore not constant either.
  • the present invention relates to a refractory material filter which overcomes this drawback.
  • the filter according to the invention is characterized in that it is formed of a series of trays of refractory material, possibly reinforced, for example using wires or a glass cloth, which are superimposed, being separated from each other, in their central parts, by empty spaces, and have holes or perforations, the holes or perforations of a tray being arranged in a row designed in relation to the holes or perforations of the adjacent plates so as to form baffles.
  • the holes or perforations can have any dimensions, depending on the desired speed of passage, dirt to be stopped or the quality of filtration. They can be cylindrical or frustoconical; they can have a circular, rectangular or square section.
  • the holes or perforations on the same plate can be aligned in two perpendicular directions; they can possibly be staggered.
  • each tray may have a projecting peripheral border.
  • the edge of the upper tray delimits a central void between the two trays.
  • each plate and its lower face may comprise at their periphery respectively pins and holes of the same diameter, these pins and these holes being arranged so that, when two plates are superimposed, the pins of the lower plate s 'engage in the holes of the upper plate, which guarantees the relative angular position of the two plates.
  • the filter according to the invention consists of trays made of re which are superimposed and, in Figure 1, three in number and indicated by the references la, lb and lc. These plates are identical, except for the fact that the upper plate 1a is thicker than the other two so as to have sufficient resistance during casting.
  • each plate 1 has on its underside a peripheral edge 2 projecting. It is pierced with holes 3 which are staggered. Furthermore, the holes of each column are, at each end of the column, located near the border 2 for a column, but spaced from this border by a distance at least equal to the diameter of the holes for the two adjacent columns. On the other hand, the end holes of each row are, one located near the border and the other spaced from this border by a distance at least equal to the diameter of the holes.
  • each of the plates 1 has on its upper face pins 5 which are of the same diameter as the holes.
  • Each of the plates is formed by pouring a refractory clay, for example an alumina slip, into a mold comprising punches whose arrangement and dimensions correspond to those of the holes 3. After closing the mold and compressing, let the clay dry. This is then baked in the usual way, for example at 900 ° C, then then at 1400 ° C, possibly with enameling.
  • a refractory clay for example an alumina slip
  • a number of plates 1 are superimposed by placing them alternately on one side and on the other, that is to say that each plate is offset from the adjacent plates by an angle of 180 ° around a vertical axis.
  • the pins 5 of a plate are thus located opposite the holes 4 of the plate which surmounts it and can thus be fitted into these holes, which secures the two plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Materials (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP87400109A 1986-01-23 1987-01-19 Feuerfester Filter Expired - Lifetime EP0234979B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8601189A FR2593077B1 (fr) 1986-01-23 1986-01-23 Filtre en matiere refractaire.
FR8601189 1986-01-23

Publications (2)

Publication Number Publication Date
EP0234979A1 true EP0234979A1 (de) 1987-09-02
EP0234979B1 EP0234979B1 (de) 1992-11-11

Family

ID=9331568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400109A Expired - Lifetime EP0234979B1 (de) 1986-01-23 1987-01-19 Feuerfester Filter

Country Status (4)

Country Link
EP (1) EP0234979B1 (de)
DE (1) DE3782513T2 (de)
ES (1) ES2035091T3 (de)
FR (1) FR2593077B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012062A2 (en) * 1990-02-09 1991-08-22 Hepworth Industrial Ceramics Limited Filter
EP0578517A1 (de) * 1992-05-29 1994-01-12 Daussan Et Compagnie Verfahren zum Behandeln von schmelzflüsssigem Metall während eines Giessvorganges unter Verwendung eines Filters sowie dazu verwendete Filter
FR2697444A1 (fr) * 1992-10-30 1994-05-06 Daussan & Co Filtre pour métal liquide à inoculant.
US5366209A (en) * 1991-12-04 1994-11-22 Daussan & Compagnie Filter for molten metal
US5603373A (en) * 1992-05-29 1997-02-18 Daussan Et Compagnie Process for treating molten metal during a casting operation using a filter and filter for implementing the process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR781101A (fr) * 1934-02-01 1935-05-09 Procédé et appareils pour l'épuration du magnésium ou de ses alliages
US3907513A (en) * 1974-05-30 1975-09-23 Us Energy Controlled porosity filter and uniform structure composites
US4298187A (en) * 1978-04-26 1981-11-03 Swiss Aluminium Ltd. Apparatus for inline degassing and filtration of molten metal
GB2101579A (en) * 1981-06-18 1983-01-19 Rolls Royce Ceramic structure
EP0135945A2 (de) * 1980-07-03 1985-04-03 Corning Glass Works Vorrichtung zum Filtrieren von festen Teilchen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721567A (en) * 1984-06-06 1988-01-26 Certech Inc. Ceramic pouring filter with tortuous flow paths

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR781101A (fr) * 1934-02-01 1935-05-09 Procédé et appareils pour l'épuration du magnésium ou de ses alliages
US3907513A (en) * 1974-05-30 1975-09-23 Us Energy Controlled porosity filter and uniform structure composites
US4298187A (en) * 1978-04-26 1981-11-03 Swiss Aluminium Ltd. Apparatus for inline degassing and filtration of molten metal
EP0135945A2 (de) * 1980-07-03 1985-04-03 Corning Glass Works Vorrichtung zum Filtrieren von festen Teilchen
GB2101579A (en) * 1981-06-18 1983-01-19 Rolls Royce Ceramic structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012062A2 (en) * 1990-02-09 1991-08-22 Hepworth Industrial Ceramics Limited Filter
WO1991012062A3 (en) * 1990-02-09 1991-09-19 Hepworth Ind Ceramics Ltd Filter
US5366209A (en) * 1991-12-04 1994-11-22 Daussan & Compagnie Filter for molten metal
EP0578517A1 (de) * 1992-05-29 1994-01-12 Daussan Et Compagnie Verfahren zum Behandeln von schmelzflüsssigem Metall während eines Giessvorganges unter Verwendung eines Filters sowie dazu verwendete Filter
US5603373A (en) * 1992-05-29 1997-02-18 Daussan Et Compagnie Process for treating molten metal during a casting operation using a filter and filter for implementing the process
US5690161A (en) * 1992-05-29 1997-11-25 Daussan Et Compagnie Process for treating molten metal during a casting operation using a filter and filter for implementing the process
FR2697444A1 (fr) * 1992-10-30 1994-05-06 Daussan & Co Filtre pour métal liquide à inoculant.

Also Published As

Publication number Publication date
EP0234979B1 (de) 1992-11-11
ES2035091T3 (es) 1993-04-16
FR2593077A1 (fr) 1987-07-24
DE3782513D1 (de) 1992-12-17
FR2593077B1 (fr) 1990-10-19
DE3782513T2 (de) 1993-05-13

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