Claims
- 1. An apparatus for continuously producing an elongated hollow metallic ingot having a cross-section in the form of a circle or other closed loop form, said apparatus comprising:
- (a) an annular water-cooled metallic mold having an open upper end and an open lower end with the cross-section of the inner periphery thereof being so shaped as to correspond to that of the outer periphery of the hollow metallic ingot;
- (b) a core member located within the inner space of said mold with the cross-section of the outer periphery thereof being so shaped as to correspond to that of the inner periphery of the hollow metallic ingot, thereby forming together with said mold a casting passage therebetween which is adapted to pass therethrough molten metal supplied thereinto from said open upper end for continuously causing solidification of the molten metal between the open upper end and the open lower end of said casting passage so as to produce the hollow metallic ingot; and
- (c) a movable supporting base member adapted to be initially so located as to close said open lower end of said casting passage for supporting the molten metal supplied in said casting passage thereon and then to be gradually lowered away from said open lower end so as to pull out the solidified metal supported thereon as the solidification of the molten metal continuously proceeds, while the molten metal is continuously supplied into said casting passage so as to compensate for the amount of metal solidified and pulled out from said casting passage, thereby permitting said hollow metallic ingot to be continuously produced, the solidification point of the molten metal within said casting passage being maintained substantially within the range between said open upper and lower ends of said casting passage;
- (d) said core member comprising:
- (i) a heat-insulating member:
- (A) made of a heat insulating material;
- (B) having a molten metal receiving vessel integrally formed therein;
- (C) being formed with at least one molten metal conducting passage communicating said molten metal receiving vessel with said casting passage for supplying the molten metal from said vessel into said casting passage; and
- (D) having a planar bottom surface;
- (ii) a casting member:
- (A) made of graphite or a carbonic material;
- (B) having a planar top surface secured to the planar bottom surface of said heat-insulating member;
- (C) comprising a thin-walled hollow portion extending along the direction in which the solidified metal is pulled out;
- (D) the outer peripheral surface of which is tapered downwardly and inwardly and which extends by an appropriate range within which the solidification commencing point is located at an appropriate position so as to form a casting face of said core member; and
- (E) the top edge of the outer peripheral surface of which joins the planar top surface of said casting member and is spaced inwardly of the lower edge of the planar bottom surface of said heat-insulating member, whereby an inwardly extending, downwardly facing planar ledge is formed at the interface of said heat-insulating member and said casting member and above the solidification commencing point;
- (iii) a molten metal supplying device including a molten metal level controller located in said molten metal receiving vessel, said molten metal level controller comprising a float and at least one dip tube arranged to maintain the level of the molten metal in said molten metal receiving vessel constant;
- (e) said heat-insulating member having an outer peripheral edge portion extending outwardly a short distance beyond the outer peripheral edge portion of said casting member so as to project into said casting passage.
- 2. An apparatus for continuously producing an elongated hollow metallic ingot having a cross-section in the form of a circle or other closed loop form, said apparatus comprising:
- (a) an annular water-cooled metallic mold having an open upper end and an open lower end with the cross-section of the inner periphery thereof being so shaped as to correspond to that of the outer periphery of a hollow metallic ingot;
- (b) a core member located within the inner space of said mold with the cross-section of the outer periphery thereof being so shaped as to correspond to that of the inner periphery of the hollow metallic ingot, thereby forming together with said mold a casing passage therebetween which is adapted to pass therethrough molten metal supplied therein to from said open upper end for continuously causing solidification of the molten metal between the open upper end and the open lower end of said casting passage so as to produce the hollow metallic ingot; and
- (c) a movable supporting base member adapted to be initially so located as to close said open lower end of said casting passage for supporting the molten metal supplied in said casting passage thereon and then to be gradually lowered away from said open lower end so as to pull out the solidified metal supported thereon as the solidification of the molten metal continuously proceeds, while the molten metal is continuously supplied into said casting passage so as to compensate for the amount of said metal solidified and pulled out from said casting passage, thereby permitting the hollow metallic ingot to be continuously produced, the solidification point of the molten petal within said casting passage being maintained substantially within the range between said open upper and lower ends of said casting passage;
- (d) said core member comprising:
- (i) a heat-insulating member:
- (A) made of a heat insulating material
- (B) having a molten metal receiving vessel integrally formed therein;
- (C) being formed with at least one molten metal conducting passage communicating said molten metal receiving vessel with said casting passage for supplying the molten metal from said vessel into said casting passage; and
- (D) having a planar bottom surface;
- (ii) a casting member:
- (A) made of graphite or a carbonic material;
- (B) having a planar top surface secured to the planar bottom surface of said heat-insulating member;
- (C) the outer peripheral surface of which is tapered downwardly and inwardly and which extends by an appropriate range within which the solidification commencing plate is located at an appropriate position so as to form a casting face of said core member;
- (D) the top edge of the outer peripheral surface of which joins the planar bottom surface of said heat-insulating member and is spaced inwardly of the lower edge of the planar bottom surface of said heat-insulating member, whereby an inwardly extending, downwardly facing planar ledge is formed at the interface of said heat-insulating member and said casting member and above the solidification commencing point; and
- (E) comprising a thin-walled hollow portion extending along the direction in which the solidified metal is pulled out;
- (iii) a heat-insulating material filled in the inner space of said thin-walled hollow portion; and
- (iv) a molten metal supplying device including a molten metal level controller located in said molten metal receiving vessel, said molten metal level controller comprising a float and at least one dip tube arranged to maintain the level of the molten metal in said molten metal receiving vessel constant.
- 3. An apparatus for continuously producing an elongated hollow metallic ingot having a cross-section in the form of a circle or other closed loop form, said apparatus comprising:
- (a) an annular water-cooled metallic mold having an open upper end and an open lower end with the cross-section of the inner periphery thereof being so arranged as to correspond to that of the outer periphery of the hollow metallic ingot;
- (b) a core member located within the inner space of said mold with the cross-section of the outer periphery thereof being so shaped as to correspond to that of the inner periphery of the hollow metallic ingot, thereby forming together with said mold a casting passage therebetween which is adapted to pass therethrough molten metal supplied thereinto from said open upper end for continuously causing solidification of the molten metal between the open upper end and the open lower end of said casting passage so as to produce the hollow metallic ingot; and
- (c) a movable supporting base member adapted to be initially so located as to close said open lower end of said casting passage for supporting the molten metal supplied in said casting passage thereon and then to be gradually lowered away from said open lower end so as to pull out the solidified metal supported thereon as the solidification of the molten metal continuously proceeds, while the molten metal is continuously supplied into said casting passage so as to compensate for the amount of metal solidified and pulled out from said casting passage, thereby permitting the hollow metallic ingot to be continuously produced, the solidification point of the molten metal within said casting passage being maintained substantially within the range between said open upper and lower ends of said casting passage;
- (d) said core member comprising:
- (i) a heat-insulating member:
- (A) made of a heat-insulating material;
- (B) having a molten metal receiving vessel integrally formed therein;
- (C) being formed with at least one molten metal conducting passage communicating said molten metal receiving vessel with said casting passage for supplying the molten metal from said vessel into said casting passage; and
- (D) having a planar bottom surface;
- (ii) a casting member:
- (A) in the form of a thin-walled cup having a planar top surface secured to the planar bottom surface of said heat-insulating member;
- (B) made of graphite or carbonic material; and
- (C) the outer peripheral surface of which is tapered downwardly and inwardly and which extends by an appropriate range within which the solidification commencing point is located at an appropriate position so as to form a casting face of said core member; and
- (iii) a molten metal supplying device including a molten metal level controller located in said molten metal receiving vessel, said molten metal level controller comprising a float and at least dip tube arranged to maintain the level of the molten metal in said molten metal receiving vessel constant.
- 4. An apparatus for continuously producing an elongated hollow metallic ingot having a cross-section in the form of a circle or other closed loop form, said apparatus comprising:
- (a) a first annular water-cooled metallic mold having an open upper end and an open lower end with the cross-section of the inner periphery thereof being so shaped as to correspond to that of the outer periphery of the hollow metallic ingot;
- (b) a core member located within the inner space of said first annular mold with the cross-section of the outer periphery thereof being so shaped as to correspond to that of the inner periphery of the hollow metallic ingot, thereby forming together with said first annular mold a casting passage therebetween which is adapted to pass therethrough molten metal supplied thereinto from said open upper end for continuously causing solidification of the molten metal between the open upper end and the open lower end of said casting passage so as to produce the hollow metallic ingot;
- (c) a movable supporting base member adapted to be initially so located as to close said open lower end of said casting passage for supporting the molten metal supplied in said casting passage thereon and then to be gradually lowered away from said open lower end so as to pull out the solidified metal supported thereon as the solidification of the molten metal continuously proceeds, while the molten metal is continuously supplied into said casting passage so as to compensate for the amount of metal solidified and pulled out from said casting passage, thereby permitting the hollow metallic ingot to be continuously produced, the solidification point of the molten metal within said casting passage being maintained substantially within the range between said open upper and lower ends of said casting passage;
- (d) said core member comprising:
- (i) a first heat-insulating member:
- (A) made of a heat insulating material;
- (B) having a molten metal receiving vessel integrally formed therein;
- (C) being formed with at least one molten metal conducting passage communicating said molten metal receiving vessel with said casting passage for supplying the molten metal from said vessel into said casting passage; and
- (D) having a planar bottom surface;
- (ii) a casting member:
- (A) made of graphite or a carbonic material;
- (B) having a planar top surface secured to the planar bottom surface of said first heat-insulating member;
- (C) comprising a thin-walled hollow portion extending along the direction in which the solidified metal is pulled out;
- (D) the outer peripheral surface of which is tapered downwardly and inwardly and which extends by an appropriate range within which the solidification commencing point is located at an appropriate position so as to form a casting face of said core member; and
- (E) the top edge of the outer peripheral surface of which joins the planar bottom surface of said heat-insulating member and is spaced inwardly of the lower edge of the planar bottom surface of said heat-insulating member, whereby an inwardly extending, downwardly facing planar ledge is formed at the interface of said first heat-insulating member and said casting member and above the solidification commencing point;
- (iii) a molten metal supplying device including a molten metal level controller located in said molten metal receiving vessel, said molten metal level controller comprising a float and at least one dip tube arranged to maintain the level of the molten metal in said molten metal receiving vessel constant;
- (e) a second annular water-cooled metallic mold secured to said first heat-insulating member; and
- (f) a second heat-insulating member interposed between said second annular water-cooled metallic mold and said casting member.
- 5. Apparatus according to claim 1, wherein the outer peripheral edge of said heat-insulating member is rounded off downwardly inwardly.
- 6. Apparatus according to claim 1, wherein another heat-insulating member made of a heat-insulating material is provided on at least the upper portion of the inner peripheral surface of said water-cooled mold, the inner peripheral edge of said another heat-insulating member projecting inwardly into said casting passage beyond the inner peripheral surface of said mold.
- 7. Apparatus according to claim 6, wherein another casting member made of graphite or a carbonic material is provided on the inner peripheral surface of said another heat-insulating member, the inner peripheral surface of said another casting member being tapered downwardly outwardly so as to form the casting face of said mold.
- 8. Apparatus according to claim 1, wherein a heat-insulating material is filled in the inner space of said thin-walled cup.
Priority Claims (1)
Number |
Date |
Country |
Kind |
59-258310 |
Jun 1984 |
JPX |
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Parent Case Info
This application is a continuation-in-part of application Ser. No. 06/693,163, filed on Jan. 22, 1985, now abandoned.
US Referenced Citations (14)
Continuation in Parts (1)
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Number |
Date |
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Parent |
693163 |
Jan 1985 |
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