JP2009082972A - Molten metal receiving crucible for molten metal holding furnace in casting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molten metal receiving crucible for a molten metal holding furnace in a casting apparatus with which defective casting caused by mixture of inclusion into the molten metal can be prevented. <P>SOLUTION: The molten metal receiving crucible 1 includes: an almost cylindrical side part 2; a molten metal receiving part 4 formed at the upper part of the side part and for once receiving the molten metal 10 supplied into the molten metal holding furnace 12 from the outer part; a bottom part 12b formed so as to close the lower end part of the side part and for preventing the shifting the molten metal received with the molten metal receiving part into the direction of the bottom part in the molten metal holding furnace; and a molten metal spouting part 5 composed of an opening hole part formed at the lower portion of the side part and for spouting the molten metal once received with the molten metal receiving part toward the inner wall face 2b at the side part of the molten metal holding furnace, wherein the molten metal spouting part is disposed so that the direction extended to the almost center of the molten metal spouting part from the almost center part of the molten metal receiving crucible 1, inclines to the direction of a tangent of a portion in the inner face at the side part of the molten metal holding furnace faced to the almost center of the molten metal spouting part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is disposed inside a molten metal holding furnace used in a casting apparatus such as a low pressure casting apparatus or a suction casting apparatus, and inclusions such as oxides present on the molten metal surface of the molten metal holding furnace when the molten metal is replenished In addition to preventing the molten metal from being caught in the mold together with the molten metal, inclusions existing at the bottom of the molten metal holding furnace are rolled up and poured into the mold together with the molten metal when the molten metal is replenished. The present invention relates to a hot water receiving crucible for a molten metal holding furnace of a casting apparatus.

  FIG. 7 is a side sectional view showing an example of a conventional low pressure casting apparatus. In FIG. 7, 11 is a furnace body, 12 is a molten metal holding furnace disposed inside the furnace body 11, 12 a is a hot water inlet formed on the upper side of the molten metal holding furnace 12, and 12 b is a bottom portion of the molten metal holding furnace 12. (Inner wall surface on the bottom side), 13 is a mold disposed above the furnace body 11, 14 is disposed in the molten metal holding furnace 12 so as to extend in the direction of gravity, and the molten metal 10 in the molten metal holding furnace 12 is moved to the metal mold. A tubular lower stalk 15 for raising in the direction of the mold 13 is a tubular upper stalk which is joined to the upper end of the lower stalk 14 and supplies the molten metal 10 from the lower stalk 14 into the mold 13. . In the low pressure casting apparatus of FIG. 7, a plurality of sets, for example, two sets of the lower stalk 14 and the upper stalk 15 are arranged in the molten metal holding furnace 12. Further, the apparatus of FIG. 7 is provided with an air supply pump (not shown) for applying a low pressure to the molten metal surface of the molten metal 10 in the molten metal holding furnace 12. In the apparatus of FIG. 7, when a low pressure is applied to the molten metal surface by the air supply pump, the molten metal 10 in the molten metal holding furnace 12 rises in the stalks 14 and 15 and moves to the mold 13. A metal product such as an aluminum product having a predetermined shape is formed by the mold 13.

  By the way, in the conventional low pressure casting apparatus as shown in FIG. 7, when the molten metal is supplied into the molten metal holding furnace 12 for replenishment, the supplied high speed molten metal passes through the molten metal surface vigorously. The inclusion P ′ such as an oxide existing on the surface of the molten metal is caught in the molten metal, and the supplied high-speed molten metal descends and reaches the bottom 12b of the molten metal holding furnace 12 vigorously. The inclusions P that have settled on the bottom 12b of the holding furnace 12 are wound up and turbulent flow is generated throughout the molten metal 10, so that the rolled up inclusions P, P 'are scattered throughout the molten metal 10. End up. Further, since the molten metal 10 in which the inclusions P and P ′ are thus scattered and mixed is supplied to the mold 13 through the stalks 14 and 15, there is a problem that defective casting occurs. It was. In order to avoid such problems, various ideas have been proposed.

For example, in Patent Document 1, a deepest concave portion is provided in the center of the bottom of the molten metal holding furnace, and inclusions are allowed to settle in the deepest part, thereby causing some turbulence in the molten metal in the molten metal holding furnace. Even in such a case, a device has been proposed in which the inclusions in the deepest part are not easily rolled up. Further, in Patent Document 2, an opening is formed on the lower side surface of the tubular stalk disposed in the molten metal holding furnace, and the molten metal in the molten metal holding furnace is taken from the opening on the side surface and sent to the upper mold. Thus, a device has been proposed in which inclusions rolled up from the bottom surface of the molten metal holding furnace do not easily enter the stalk. Further, in Patent Document 3, a bowl-shaped filter is provided around the stalk in the molten metal holding furnace so as to partition the inside of the molten metal holding furnace into the stalk periphery and other parts. Proposals have been made to prevent inclusions from entering the stalk by means of a filter even if inclusions are present. Furthermore, Patent Document 4 discloses a device in which a filter is disposed in the lower end opening of the stalk so that the inclusion does not enter the stalk by the filter even if the inclusion exists in the molten metal holding furnace. is suggesting.
JP 2002-301561 A JP 2001-293549 A JP 2000-225456 A JP-A-8-1303

  However, when the method of Patent Document 1 is used, the shape of the bottom portion of the molten metal holding furnace is complicated, which may cause problems such as an increase in manufacturing cost of the molten metal holding furnace and insufficient strength of the bottom portion of the molten metal holding furnace. . In addition, when the inclusion is rolled up and dispersed throughout the molten metal in the molten metal holding furnace, the inclusion is contained together with the molten metal in the stalk from the opening on the lower side of the stalk. There is a problem of getting in. In addition, when the methods of Patent Document 3 and Patent Document 4 are used, the filter is frequently clogged, and thus the maintenance and cost of the filter are increased (and the melt in the molten metal holding furnace is removed due to the presence of the filter). There is a problem such as being unable to move to Stoke smoothly.

  As described above, all of the above-mentioned Patent Documents 1 to 4 indicate that “at the time of refilling the molten metal, inclusions such as oxides on the surface of the molten metal holding furnace are caught in the molten metal, and the bottom of the molten metal holding furnace is The inclusions are wound up and further turbulent flow is generated in the molten metal holding furnace, and the inclusions are scattered throughout the molten metal. The purpose was to prevent the inclusions from entering the stalk, so the purpose of preventing casting defects due to inclusion of inclusions in the molten metal sent from the molten metal holding furnace to the mold was sufficient. However, even if it can be achieved to some extent, there is a problem that the manufacturing and maintenance of the apparatus must be expensive.

  The present invention has been made paying attention to such a problem of the prior art, and "when the molten metal is replenished, inclusions such as oxides on the surface of the molten metal are caught in the molten metal, The inclusions at the bottom are rolled up, and further turbulent flow is generated in the molten metal holding furnace, and the inclusions wound and / or rolled up are scattered throughout the molten metal. For the molten metal holding furnace, which can effectively prevent casting defects caused by inclusions mixed into the molten metal sent from the molten metal holding furnace to the mold without costly manufacturing and maintenance of the equipment. An object is to provide a hot water crucible.

  A hot water receiving crucible for a molten metal holding furnace of a casting apparatus according to the present invention for solving the problems as described above is a hot water receiving crucible disposed inside the molten metal holding furnace, and has a substantially cylindrical side portion, Formed in the upper part of the side part, formed so as to block the molten metal receiving part for receiving and receiving the molten metal supplied from the outside to the molten metal holding furnace vigorously at high speed, and the lower end part of the side part, The molten metal received by the hot water receiving part comprises a bottom for preventing the molten metal from moving in the direction of the bottom of the molten metal holding furnace, and an opening formed in a lower part of the side part, and the hot water receiving part A molten metal discharge portion for discharging the molten metal once received by the molten metal holding furnace toward a lateral inner wall surface of the molten metal holding furnace, the molten metal discharge portion from the substantially central portion of the molten metal crucible to the molten metal The direction extending to the approximate center of the discharge part is It is disposed so as to be inclined with respect to the direction in which the side inner wall surface of the molten metal holding furnace facing the substantially center of the molten metal discharge portion extends or the tangential direction of the side wall surface portion. Is.

  In the present invention, the molten metal supplied from the outside into the molten metal holding furnace vigorously and at a high speed is received by the molten metal receiving portion of the molten metal crucible and received and decelerated and then slowly descends. Even when passing, inclusions such as oxides on the surface of the molten metal are not involved in the molten metal. Further, the molten metal supplied from the outside into the molten metal holding furnace vigorously at a high speed is received and received by the molten metal receiving portion of the molten metal crucible, and then slowly descends in the molten metal crucible by its own weight. Since the bottom part exists in the said hot water receiving crucible, the said molten metal is not discharge | released toward the bottom part of the said molten metal holding furnace. Therefore, in the present invention, as in the prior art, “the molten metal replenished / supplied from the outside vigorously passes through the molten metal surface as it is, and inclusions such as oxides on the molten metal surface are involved in the molten metal. At the same time, it is prevented that the inclusions that have descended and reached the bottom of the molten metal holding furnace and precipitated at the bottom of the molten metal holding furnace are wound up, and further turbulent flow is generated throughout the molten metal.

  In the present invention, the molten metal supplied from the outside into the molten metal holding furnace vigorously at high speed is received by the molten metal receiving portion of the molten metal crucible and received and decelerated, and then descends in the molten metal crucible by its own weight. Then, it moves from the inside of the receiving hot metal crucible into the molten metal holding furnace through the molten metal discharge part (and the opening (see reference numeral 4 and arrow α3 in FIG. 4)) below the side of the hot water receiving crucible. . At that time, the molten metal discharge portion extends in the direction extending from the approximate center of the molten metal crucible to the approximate center of the molten metal discharge portion (see reference numeral S in FIGS. 5 and 6). With respect to the direction of the side inner wall surface (refer to the reference symbol U ′ in FIG. 6) facing the substantially center of the molten metal discharge portion or the direction of the tangent line to the side inner wall surface portion (curved surface portion) (refer to the reference symbol U in FIG. 5). Since the molten metal discharged from the molten metal discharge portion is arranged so as to be inclined, the distance between the molten metal discharge portion and the side inner wall surface of the molten metal holding furnace is in a wider direction (wider side). Will flow out (see arrow α2 in FIG. 4). Therefore, the molten metal discharged from the molten metal discharge portion moves along the side inner wall surface of the molten metal holding furnace while rising in a substantially horizontal direction or gradually. Therefore, in the present invention, as in the prior art, “the molten metal replenished / supplied from outside entrains the oxide on the surface of the molten metal in the molten metal holding furnace and winds up the inclusions at the bottom in the molten metal holding furnace. It is possible to prevent a turbulent flow from being generated in the entire melt in the molten metal holding furnace and scattering of the inclusions and / or rolled up inclusions in the entire molten metal in the molten metal holding furnace.

  Therefore, according to the present invention, "at the time of replenishing the molten metal, the replenished molten metal passes through the molten metal surface in the molten metal holding furnace vigorously so that the oxide on the molten metal surface is entrained in the molten metal and the replenished molten metal is It is possible to prevent the inclusions at the bottom of the molten metal holding furnace from being rolled up and reaching the bottom of the molten metal holding furnace, and the inclusions rolled up by the turbulent flow to be scattered throughout the molten metal. Therefore, it is possible to prevent a casting failure caused by inclusion of inclusions in the molten metal sent to the mold from the molten metal holding furnace, which has been a problem in the past, at low cost.

  The best mode for carrying out the present invention is a mode as described in Example 1 below.

  1 is a perspective view showing a hot water receiving crucible for a molten metal holding furnace according to a first embodiment of the present invention, FIG. 2 (a) is a plan view of the hot water receiving crucible, and FIG. 1 (b) is a molten metal receiving portion of the hot water receiving crucible. Is a side sectional view of the molten metal discharge portion of the receiving crucible when viewed from the center. In addition, in FIG. 1, like FIG.2 (b) (c), the upper part of the hot water receiving crucible is abbreviate | omitted and shown in figure.

  1 and 2, reference numeral 1 denotes a hot water receiving crucible formed of a heat-resistant material such as graphite ceramic, fine ceramic, and other ceramics, and 2 denotes a substantially cylindrical side constituting a part of the hot water receiving crucible 1. 2a (see FIG. 2 (a)) is an inner wall surface of the side part 2, provided on the outer peripheral part above the side part 2 and used for lifting the hot water crucible 1 3 is a substantially disk-shaped bottom part constituting a part of the hot water crucible 1, 4 is a half part of the side part, and a part excluding a part near the lower end part of the side part 2 is notched. A molten metal receiving portion 5 is formed as a molten metal discharge portion formed as an opening in a part of the lower portion (near the lower end portion) of the side portion 2. Here, the bottom part 3 is for preventing the molten metal once received by the molten metal receiving part 4 from dropping and reaching the bottom part of the molten metal holding furnace by its own weight. The molten metal discharge section 5 is adapted to flow the molten metal that has been once received by the molten metal receiving section 4 and descended by its own weight in the molten metal receiving crucible 1 in the direction of the side wall surface of the molten metal holding furnace. It is also a thing.

  Next, FIG. 3 is a schematic sectional side view showing a state where the hot water receiving crucible of the first embodiment is installed and fixed in the molten metal holding furnace. In FIG. 3, 11 is a furnace body, 12 is a molten metal holding furnace disposed inside the furnace body 11, 12 a is a hot water inlet formed on the upper side of the molten metal holding furnace 12, and 12 b is a bottom portion of the molten metal holding furnace 12. (Inner wall surface on the bottom side), 13 is a mold disposed above the furnace body 11, 14 is disposed in the molten metal holding furnace 12 so as to extend in the direction of gravity, and the molten metal in the molten metal holding furnace 12 is used as the mold. A tubular lower stalk 15 for raising in 13 directions is a tubular upper stalk joined to the upper end of the lower stalk 14 to supply molten metal from the lower stalk 14 into the mold 13. In the low-pressure casting apparatus shown in FIG. 3, a plurality of, for example, two sets of the lower stalk 14 and the upper stalk 15 are arranged (see FIG. 4). Further, the apparatus of FIG. 3 is provided with an air supply pump (not shown) for applying a low pressure to the molten metal surface of the molten metal 10 in the molten metal holding furnace 12. In the apparatus of FIG. 3, when a low pressure is applied to the molten metal surface by the air supply pump, the molten metal 10 in the molten metal holding furnace 12 rises in the stalks 14 and 15 and moves to the mold 13. A metal product such as an aluminum product having a predetermined shape is formed by the mold 13.

  Further, in the low pressure casting apparatus shown in FIG. 3, the hot water receiving crucible 1 according to the first embodiment is arranged and fixed in a predetermined direction at a predetermined position in the molten metal holding furnace 12. FIG. 4 is a diagram showing the apparatus of FIG. 3 partially seen from above, and FIG. 5 is a diagram schematically showing the positional relationship between the hot water crucible 1 and the molten metal holding furnace 12 in the apparatus of FIG. .

  In the first embodiment, as shown in FIGS. 4 and 5, the hot water crucible 1 extends from a substantially central portion Q of the hot water crucible 1 to a substantially central portion R of the molten metal discharge portion 5 (FIG. 5). The portion of the side inner wall surface facing the substantially center R of the molten metal discharge portion 5 of the molten metal holding furnace 12 (the straight line S in FIG. 5 corresponds to the side inner wall surface of the molten metal holding furnace 12). 5 is inclined at a predetermined angle (for example, about 80 to 40 degrees is desirable in the first embodiment) without being orthogonal to the direction of the tangent line (see the tangent line U in FIG. 5). Are arranged to be.

  Next, operation | movement of the hot water receiving crucible 1 of the present Example 1 is demonstrated based on FIG. When the molten metal 10 in the molten metal holding furnace 12 is reduced, the molten metal is fed from the hot water inlet 12a of the molten metal holding furnace 12 by using a non-illustrated hot water supply jogo (see JP-A-7-77283). Inject (see arrow α1 in FIG. 3). In this case, the opening at the lower end of the hot water inlet 12a shown in FIG. 3 is made to face and close to the molten metal receiving portion 4 of the hot water crucible 1 in advance. Therefore, the high-speed molten metal injected at high speed from the hot water inlet 12a is once received by the inner wall surface of the side portion 2 of the hot water receiving crucible 1 through the molten metal receiving portion 4 of the hot water receiving crucible 1. It is received in the hot water receiving crucible 1. The molten metal once received from the hot water receiving portion 4 in this manner is then lowered in the hot water receiving crucible 1 by its own weight, but is not further lowered by the bottom portion 3 of the hot water receiving crucible 1. (This prevents the molten metal from descending and reaching the bottom 12b of the molten metal holding furnace 12).

  As described above, when the hot water receiving crucible 1 according to the first embodiment is used, the high-speed molten metal injected from the hot water inlet 12a is lowered and reaches the bottom 12b of the molten metal holding furnace 12 as it is. Disappears. Therefore, when the hot water receiving crucible 1 according to the first embodiment is used, the molten metal injected at a high speed into the molten metal holding furnace 12 from the molten metal inlet 12a passes through the molten metal surface vigorously as in the prior art. Inclusions such as oxides on the surface of the molten metal are entrained in the molten metal, and further, the inclusions P that have been vigorously lowered and reached the bottom 12b of the holding furnace 12 and have been deposited on the bottom 12b until then are wound up. And the molten metal causes a turbulent flow in the entire molten metal 10 in the molten metal holding furnace 12 and scatters the inclusions P and P ′ entrained and / or wound up in the entire molten metal 10, Is prevented.

  Further, the hot water receiving crucible 1 according to the first embodiment is disposed in the molten metal holding furnace 12 so that the molten metal discharge portion 5 is inclined with respect to the side inner wall surface (tangent line) of the molten metal holding furnace 12. (See FIG. 5). Therefore, when the molten metal 10 received in the hot water receiving crucible 1 descends in the hot water receiving crucible 1 and is discharged from the molten metal discharging portion 5, a part of the molten metal 10 of the molten metal discharging portion 5 of the side portion 2 is obtained. Although it overflows and flows from the upper part of the vicinity part 2c (refer FIG.2 (b) (c)) to the upper direction of FIG. 3 (refer arrow (alpha) 3 of FIG. 3, FIG. 4), the remainder is the said molten metal discharge | release part 5 and the said It flows toward the side where the distance from the side inner wall surface of the molten metal holding furnace 12 is wide (in the example shown in FIGS. 3 and 4, the molten metal discharged from the molten metal discharge portion 5 is And flows in the molten metal holding furnace 12 in a clockwise direction as indicated by an arrow α2). Thus, the molten metal 10 from the molten metal discharge part 5 is always in one direction (the molten metal discharge part) along the lateral inner wall surface of the molten metal holding furnace 12 by the hot water receiving crucible 1 of the first embodiment. 5 and the side inner wall surface of the molten metal holding furnace 12 is released in a substantially horizontal direction. The molten metal thus discharged (the molten metal 10 just replenished) is hotter than the existing molten metal 10 in the molten metal holding furnace 12, so that the molten metal holding furnace 12 has a substantially spiral shape. Ascending gradually while turning.

  As described above, when the hot water receiving crucible 1 according to the first embodiment is used, the molten metal received from the molten metal receiving portion 4 of the hot water receiving crucible 1 descends in the hot water receiving crucible 1 due to its own weight (that At that time, as described above, a part of the side portion 2 overflows from the vicinity of the molten metal discharge portion 5 in the vicinity of the molten metal discharge portion 5 (see FIGS. 2B and 2C) and flows upward in FIG. (See arrow α3 in FIGS. 3 and 4)) However, since the bottom 3 is present in the hot water receiving crucible 1, the molten metal does not move or reach the bottom 12b of the molten metal holding furnace 12. Therefore, when the hot water receiving crucible 1 according to the first embodiment is used, as in the past, “the molten metal replenished / supplied from the outside descends and reaches the bottom portion 12b of the molten metal holding furnace 12 and reaches the molten metal holding furnace 12”. It is prevented that the inclusions P that have settled on the bottom portion 12b are wound up.

  Further, when the hot water receiving crucible 1 according to the first embodiment is used, the molten metal received in the molten metal receiving portion 4 of the hot water receiving crucible 1 is lowered by its own weight, and a part of the molten metal received in the side portion 2 3 overflows from above the vicinity 2c (see FIGS. 2B and 2C) of the molten metal discharge portion 5 (see arrow α3 in FIGS. 3 and 4). It is discharged into the molten metal holding furnace 12 from a molten metal discharge portion 5 formed on the lower side portion of the hot water crucible 1. In that case, the molten metal discharge | release part 5 is a direction (straight line of FIG. 5) extended from the approximate center part (refer Q of FIG. 5) of the said hot-water receiving crucible 1 to the approximate center (refer R of FIG. 5) of the said molten metal discharge | release part 5. S reference) with respect to the direction of the tangent (see U in FIG. 5) of the side inner wall surface portion (see T in FIG. 5) of the molten metal holding furnace 12 facing substantially the center R of the molten metal discharge part 5 It is arranged to incline. Therefore, in the first embodiment, the molten metal 10 discharged from the molten metal discharge portion 5 has a wider distance between the molten metal discharge portion 5 and the side inner wall surface of the molten metal holding furnace 12 (in this case) Are released in the clockwise direction). Therefore, the molten metal 10 discharged from the molten metal discharge portion 5 gradually increases in a substantially circumferential shape or spiral shape along the side inner wall surface of the molten metal holding furnace 12 (in the clockwise direction in the example of FIG. 4). Turn and move while ascending. Therefore, when using the hot water receiving crucible 1 of the first embodiment, as in the past, “the molten metal replenished / supplied from the outside generates turbulent flow in the entire molten metal in the molten metal holding furnace 12, The scattering of the rolled up inclusions P in the entire molten metal 12 in the holding furnace 12 is prevented.

  As described above, in the first embodiment, as described above, “the inclusion P of the bottom 12b of the molten metal holding furnace 12 is rolled up when the molten metal is replenished, and the entire molten metal 10 in the molten metal holding furnace 12 is disturbed. It can be prevented that the flow is generated and the rolled up inclusions P are scattered throughout the molten metal 10. Further, in the first embodiment, it is possible to prevent “inclusion P ′ on the surface of the molten metal in the molten metal holding furnace 12 from being caught in the molten metal 10 when the molten metal is replenished”. Therefore, according to the first embodiment, it is possible to prevent casting defects caused by inclusion P inclusions in the molten metal 10 sent from the molten metal holding furnace 12 to the mold 13, which has been a problem in the past. become able to.

  In addition, according to the experiment of the present inventor, when the hot water receiving crucible 1 of the first embodiment is used, a defect due to inclusion of inclusions is compared with the case where the hot water receiving crucible 1 of the first embodiment is not used. The rate was reduced by 60% or more.

  While the first embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made. For example, in the first embodiment, the example in which the hot water receiving crucible 1 is disposed in the molten metal holding furnace 12 of the low pressure casting apparatus has been shown. However, the present invention is not limited to this, and various types such as a suction casting apparatus can be used. It can be applied to a molten metal holding furnace of a casting apparatus.

  Moreover, in the said Example 1, although the example which arrange | positions the hot water receiving crucible 1 in the planar substantially cylindrical molten metal holding furnace 12 was shown, this invention is not limited to this, For example, a bus furnace (Unexamined-Japanese-Patent No. A hot water receiving crucible can also be arranged in, for example, Japanese Patent Publication No. 2006-346718. That is, FIG. 6 is a schematic diagram showing an arrangement relationship when the hot water crucible 1 according to the present invention is arranged in a substantially rectangular bath furnace 21. In this case, as shown in FIG. 6, the molten metal discharge part 5 of the hot water receiving crucible 1 extends from the substantially central part (see Q in FIG. 6) of the molten metal discharge crucible 1 to the approximate center (R in FIG. 6). The direction (see the straight line S in FIG. 6) extending in the direction of the reference (see FIG. 6) is a portion of the bath furnace 21 that faces the substantially center R of the molten metal discharge portion 5 (the straight line S in FIG. 6 hits the side inner wall surface of the bath furnace 21. (Refer to the portion indicated by T ′ in FIG. 6) is inclined with respect to the extending direction of the inner side wall surface (see straight line U ′ in FIG. 5) (for example, inclined at an angle of about 80 to 40 degrees) Are arranged as follows. Therefore, even in the case where the hot water receiving crucible 1 is disposed in such a planar rectangular bath furnace 21, substantially the same effect as in the first embodiment can be obtained.

The perspective view for demonstrating the hot water receiving crucible for molten metal holding furnaces by Example 1 of this invention. (A) is a plan view of the hot water receiving crucible of the first embodiment, (b) is a side sectional view when the molten metal receiving portion of the hot water receiving crucible is arranged at the center, and (c) is this hot water receiving crucible. The side view when arrange | positioning and seeing the molten metal discharge | release part in the center. The schematic sectional side view which shows the state which installed and fixed the hot water receiving crucible of the present Example 1 in the molten metal holding furnace. The figure which shows a state when the apparatus of FIG. 3 is seen partially through from above. The figure which shows typically the positional relationship of the hot water receiving crucible and molten metal holding furnace in the apparatus of FIG. The figure which shows typically the positional relationship of a hot-water supply crucible and a bath furnace when the hot-water supply crucible 1 is arrange | positioned in the flat rectangular bath furnace. Schematic for demonstrating the conventional low temperature casting apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water crucible 2 Side part 2a Protrusion part 2b Inner wall surface 3 Bottom part 4 Melt receiving part 5 Molten discharge part 10 Molten metal 11 Furnace body 12 Molten metal holding furnace 12 Molten metal 12a Hot water inlet 12b Bottom part 13 Mold 14 Lower stalk 15 Upper stalk 21 Bath furnace P Inclusion

Claims (1)

A hot water receiving crucible disposed inside a molten metal holding furnace of a casting apparatus,
A substantially cylindrical side,
A molten metal receiving part that is formed in an upper part of the side part and receives a molten metal supplied from the outside into the molten metal holding furnace,
A bottom for preventing the molten metal received by the hot water receiving portion from moving in the direction of the bottom of the molten metal holding furnace;
A molten metal discharge part for discharging the molten metal once received by the molten metal receiving part toward a lateral inner wall surface of the molten metal holding furnace, comprising an opening formed in a lower part of the side part;
The molten metal discharge part has a side inner wall surface of the molten metal holding furnace in which a direction extending from a substantial center of the molten metal discharge crucible to a substantial center of the molten metal discharge part is opposed to a substantial center of the molten metal discharge part. A molten metal holding crucible for a molten metal holding furnace of a casting apparatus, wherein the crucible is arranged so as to be inclined with respect to a direction in which the steel plate extends or a tangential direction of a side inner wall surface portion thereof.

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