WO2019111385A1 - Molten metal filtration apparatus - Google Patents

Abstract

A molten metal filtration apparatus 100 is provided with: a can body 10 having an opening 10a; a lid body 20 that covers the opening 10a of the can body 10; a filter body 30 that is provided in the can body 10 and that filters a molten metal; and a pressing unit 40 that is installed in the lid body 20 and that has a pressing member 41 capable of moving relative to the lid body 20 and capable of pressing the filter body 30 toward the can body 10.

Description

Molten metal filter

The present invention relates to a molten metal filter device.

A filtration device for filtering molten metal such as aluminum and removing inclusions and the like contained in the molten metal is known. For example, as shown in Patent Document 1, this filter device includes a filter body (assembly 5) and a can body (tank body including a first upstream bathroom and a second downstream bathroom partitioned by the filtration body. 1) equipped. The filter body is placed on the receptacle (candle 4) of the can so as to surround the flow path of the molten metal filtered by the filter body.

In such a filtration device, since the filter body is not fixed to the receiving portion of the can, the filter body becomes unstable due to the buoyancy by the molten metal, and a gap is generated between the filter body and the receiving portion of the can Molten metal may leak out. In this case, restoration of the filtration device and various facilities installed downstream thereof requires a great deal of time and cost. Therefore, it is important to ensure a tight seal between the filter body and the receptacle of the can.

In view of this fact, according to Patent Document 2, the weight (45) is placed on the filter body (filter unit 40) to receive the filter body (filter unit 40) and the can body (can portion 20) It has been proposed to improve the sealing properties with the lid 22). In the filtration device of Patent Document 2, although the sealed state between the filter body and the receptacle of the can is better than that of the filtration device described in Patent Document 1, leakage of molten metal is more surely prevented. Room for improvement.

Moreover, in patent document 3, fixing a filter body to a can (can part 20) with a casing (70) is proposed. However, in order to realize sufficient sealing performance, it is necessary to drive the housing into the plurality of recesses (39) so that pressure is applied between the filter body and the receptacle of the can. In the fixing method in which the driving force is inserted, it is difficult to fix with a uniform pressure each time fixing, so the filtering device of Patent Document 3 has a problem that the sealing performance can not be stably improved.

Japanese Patent Application Laid-Open No. 63-147509 Patent No. 5669718 gazette Patent No. 6177442 gazette

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a molten metal filter device that can easily improve the sealability between a filter body and a receiving portion of a can.

The molten metal filtration device according to the present invention is
A can having an opening,
A lid covering the opening of the can;
A filter body provided in the can for filtering molten metal;
And a pressing unit disposed on the lid, the pressing unit having a pressing member capable of pressing the filter against the can by moving relative to the lid.

According to the present invention, it is possible to provide a molten metal filtering device capable of easily realizing high sealing performance between the filter body and the can because the filter is pressed toward the can by the pressing unit. Can.

It is a schematic plan view showing the molten metal filtration device by one embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. FIG. 3 is an enlarged view of a region III surrounded by a two-dot chain line in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. FIG. 5 is a cross-sectional view taken along the line V-V of FIG. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. It is a schematic sectional drawing which shows the molten metal filter apparatus by the modification of FIG. It is a schematic sectional drawing which shows the molten metal filter apparatus by the further modification of FIG.

Hereinafter, a molten metal filter 100 according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic plan view showing a molten metal filter 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. FIG. 3 is an enlarged view of a region III surrounded by an alternate long and short dash line in FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2, FIG. 5 is a cross-sectional view taken along line VV of FIG. 1, and FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. In this specification, an XYZ three-dimensional coordinate system is defined in which the right direction in FIG. 1 is the X axis positive direction, the upper direction in FIG. 1 is the Y axis positive direction, and the near direction in FIG. Will be explained. In the present embodiment, the XY plane is parallel to the horizontal plane, and is defined at a position including a contact area between the filter body 30 and the can 10 described later. The Z axis is an axis parallel to the vertical direction, and is defined at a position passing the center of gravity of the filter body 30. In the present embodiment, the positive Z-axis direction is the upper direction, and the negative Z-axis direction is the lower direction.

As shown in FIG. 1 to FIG. 2 and FIG. 4 to FIG. 6, the molten metal filter 100 comprises a can 10 having an opening 10 a, a lid 20 covering the opening 10 a of the can 10, and the can 10. The filter body 30 provided inside and the press unit 40 installed in the lid 20 are provided. The pressing unit 40 has a pressing member 41 that can move relative to the lid 20. The pressing member 41 moves relative to the lid 20 to press the filter body 30 toward the can 10. Moreover, as shown in FIG. 2, the can 10 has the 1st bathroom 11 and the 2nd bathroom 12 divided by the filter body 30. As shown in FIG. The molten metal flows from the first bathroom 11 through the filter body 30 to the second bathroom 12. At this time, the filter body 30 filters the molten metal.

As shown in FIG. 1 to FIG. 2 and FIG. 4 to FIG. 6, the can 10 has a substantially rectangular parallelepiped shape, and is a molten metal filtered to a side parallel to the YZ plane and having a positive X coordinate. A hot water inlet 14 for introducing the first molten metal into the first bathroom 11 and a hot water outlet 15 for discharging the filtered molten metal from the second bathroom 12 are provided. Furthermore, the can 10 includes a first flow passage 14a for guiding the molten metal filtered from the inlet 14 to the first bathroom 11, and a second flow passage 15a for guiding the molten metal filtered from the second bathroom to the outlet 15. And have.

The lid 20 has a substantially rectangular parallelepiped shape, and has a through hole 20 a through which the Z axis passes in a state of covering the opening 10 a of the can 10. As shown in FIG.1 and FIG.2, the press unit 40 is installed in the cover 20 in the position in which the through-hole 20a was formed. Then, the pressing member 41 of the pressing unit 40 extends from the outside of the lid 20 into the first bathroom 11 of the can 10 along the Z axis through the through hole 20 a.

As shown in FIGS. 2 to 6, the filter body 30 includes a support plate 31 and a plurality of tube-shaped filtration elements 32 supported from the periphery by the support plate 31. The support plate 31 is made of a ceramic that hardly reacts with the molten metal. The filter element 32 is made of porous ceramic and has pores through which molten metal can flow and be filtered. The outer edge area of the support plate 31 comprises a flange portion 31 f surrounding the periphery of the filtering element 32.

Moreover, as shown to FIG. 2, FIG. 3 etc., the can 10 has the receiving part 13 which receives the filter body 30. As shown in FIG. For this reason, when the filter body 30 is pressed by the pressing member 41 of the pressing unit 40, the flange portion 31 f presses the receiving portion 13 of the can 10. As shown in FIG. 3, a packing 50 is disposed between the filter body 30 and the receiving portion 13 of the can 10, and between the flange portion 31 f of the filter body 30 and the receiving portion 13 of the can 10. Is preferably sealed in a liquid tight manner. The packing 50 is preferably made of, for example, fibrous alumina.

An opening 12a which is an inlet of the second bathroom 12 is formed inside the can 10, and the filter body 30 is disposed so as to cover the opening 12a. In the example shown in FIG. 4, the opening 12 a has a regular octagonal shape as viewed in the Z-axis direction, and the periphery thereof is defined by the receiving portion 13 of the can 10. Corresponding to the shape of such a receiving portion 13, the flange portion 31f of the filter body 30 also has a regular octagonal outline. This outline is a similar figure obtained by slightly enlarging the regular octagonal shape of the opening 12a defined by the receiving portion 13, and the center thereof coincides with the origin O. In addition, the opening 12a and the filter body 30 are not limited to a regular octagon, and can take shapes, such as a circle, a square, and a hexagon.

The plurality of filter elements 32 included in the filter body 30 have a bottomed cylindrical shape with one end being a closed end 32c and the other end being an open end 32f. In the illustrated example, the axial direction of the tubular filtration element 32 is parallel to the Z axis. Here, the axial direction of the filtering element 32 means a direction parallel to a straight line connecting both ends of the filtering element 32. As shown in FIG. 2, all filtration elements 32 are aligned with the closed end 32c at the top and the open end 32f at the bottom. Each filter element 32 is supported by a support plate 31 positioned on the XY plane near the open end 32 f. Of course, the support plate 31 has an opening at a position corresponding to the filtration element 32 so as not to close the open end 32 f of the filtration element 32 while supporting the filtration element 32. Thus, since the filtering element 32 is disposed above the support plate 31, the receiving portion 13 of the present embodiment is configured to surround the flow path of the molten metal filtered by the filtering element 32. There is.

The support plate 31 is made of a uniform material and a uniform thickness. Further, as shown in FIG. 4, the filter body 30 of the present embodiment includes 22 filter elements 32 and is disposed symmetrically with respect to the X axis and the Y axis. Each filter element 32 has the same structure as one another. The center of gravity of the filter body 30 having such a symmetrical configuration coincides with the origin O as viewed from the Z-axis direction, as described above.

Next, the pressing unit 40 will be described with reference to FIGS. 2 and 5. Here, it is assumed that the lid 20 covers the opening 10 a of the can 10. The pressing unit 40 has the pressing member 41 described above, and an axial force generating means 42 including a pressing force control means described later and generating an axial force for pressing the pressing member 41 in the axial direction (Z axis direction). ing. The pressing member 41 of the present embodiment has a rod-like body portion 41r extending in the vertical direction, and the central axis coincides with the Z axis. The upper end portion of such a pressing member 41 is connected to the axial force generating means 42, and penetrates the through hole 20a of the lid 20 toward the lower end portion to the inside of the first bathroom 11 from the outside of the can 10 It is hanging down.

The pressing member 41 of the present embodiment has a contact portion at the lower end for dispersing the pressing force. As shown in FIGS. 2 and 5, the contact portion 41 p is configured as a circular plate-like member that extends in parallel with the XY plane. The contact portion 41p is fixed to the lower end of the rod portion 41r by a suitable fixing tool such as a bolt so that the center position of the contact portion 41p coincides with the central axis of the rod portion 41r. Therefore, the axial force generated by the axial force generation means 42 acts on the filter body 30 at the position of the origin O as viewed from the Z-axis direction via the rod-like body portion 41r and the contact portion 41p. In other words, the filter body 30 is pressed by the pressing unit 40 at the position of the center of gravity when viewed from the Z-axis direction. Here, it is preferable that a packing (not shown) be provided between the contact portion 41 p and the filter body 30 in that the pressing force from the contact portion 41 p is uniformly applied to the upper surface of the filter body 30.

The axial force generation means 42 includes a cylindrical housing 43 fixed to the upper surface of the lid 20 and rising vertically upward, an axial force generation unit 44 supported by the upper portion of the housing 43, and a lower portion of the axial force generation unit 44. And pressing force control means for controlling the pressing force of the pressing member 41 against the filter body 30. In the present embodiment, a coil spring 45 is employed as pressing force control means. However, the pressing force control means is not particularly limited as long as it has a function of applying the pressing force necessary for fixing the filter body 30. Therefore, as will be described in detail later, for example, a hydraulic cylinder, an air cylinder or the like may be employed as the pressing force control means. The coil spring 45 employed in the present embodiment is disposed as an example of pressing force control means, has a simple configuration, and has a function of applying pressing force necessary for fixing the filter body 30, and is also excessive. It is suitable at the point which can take on the function which prevents that a force acts on filter body 30, and is suitable.

The axial force generation unit 44 has a bolt (not shown) that moves relative to the housing 43 in the vertical direction by the rotation of the handle 46. A coil spring 45 is disposed between the lower end of the bolt and the upper end of the pressing member 41. In such a configuration, the coil spring 45 is compressed by displacing the bolt of the axial force generation unit 44 vertically downward. Then, the resilient force from the compressed coil spring 45 acts on the pressing member 41. That is, the axial force generated by the axial force generation unit 44 is transmitted to the pressing member 41 via the coil spring 45.

Next, the operation of the molten metal filter 100 according to the present embodiment will be described. Here, as the initial state of the molten metal filter 100, the filter body 30 is disposed at an appropriate position in the can 10, but the opening 10a of the can 10 is not covered by the lid 20. Suppose.

First, prior to filtering the molten metal, the handle 46 of the pressing unit 40 is rotated as needed, and the amount of downward protrusion of the pressing member 41 with respect to the lid 20 is reduced. As a result, when the opening 10 a of the can 10 is covered with the lid 20, the pressing member 41 can be prevented from contacting the filter body 30 undesirably and damaging the filter body 30. Then, in this state, the lid 20 is transported above the opening 10 a of the can 10 using a transport device such as a crane, and positioned relative to the can 10. Then, the lid 20 is lowered, and the opening 10 a of the can 10 is covered by the lid 20.

Next, the handle 46 of the pressing unit 40 is rotated to lower the bolt in the negative Z-axis direction. With this lowering, the separation distance between the contact portion 41p and the filter body 30 gradually decreases, and eventually the contact portion 41p abuts on the filter body 30. When the handle 46 is further rotated to lower the bolt from this state, the coil spring 45 is compressed and a resilient force is generated between the bolt and the pressure member 41 because the pressure member 41 can not be further lowered. This elastic force is the pressing force of the pressing unit 40. Therefore, based on the fact that the spring constant of the coil spring 45 is known, the pressing force of the pressing unit 40 is substantially evaluated and managed by the amount of compression of the coil spring 45. Therefore, when the amount of compression of the coil spring 45 reaches a predetermined value, it is considered that a desired pressing force is achieved, and the rotation operation of the handle 46 is stopped. Of course, a detecting device such as a load cell for detecting the pressing force may be disposed in the pressing unit 40, and the rotation operation of the handle 46 may be stopped when the detection result of the detecting device becomes a desired value.

The pressing force by the pressing unit 40 is dispersed and acts on the plurality of filtration elements 32 by the presence of the contact portion 41p. By the action of this pressing force, the flange portion 31 f of the filter body 30 presses the receiving portion 13 of the can 10 through the packing 50. The force acting between the flange portion 31 f and the receiving portion 13 is a combined force of the gravity acting on the filter body 30 and the pressing force by the pressing unit 40. Furthermore, the pressing force by the pressing member 41 acts on the position of the center of gravity of the filter body 30 when viewed from the Z-axis direction. As a result of the above, since the packing 50 disposed between the flange portion 31 f and the receiving portion 13 is uniformly pressed with a sufficient force, the sealing performance between the filter body 30 and the receiving portion 13 is sufficiently enhanced. . This completes the preparation for filtering the molten metal.

Next, the molten metal to be filtered is poured into the inlet 14. The molten metal that has been poured in flows from the hot water inlet 14 into the first bathroom 11 through the first flow passage 14 a. The molten metal flowing into the first bathroom 11 passes through the inside of the bottomed cylindrical filtration element 32 of the filtration body 30 while being filtered from the outside to the inside. The filtered molten metal flows from the lower open end 32 f of the filtering element 32 through the opening 12 a into the second bathroom 12.

When the amount of the molten metal remaining in the first bathroom 11 increases, the molten metal acts on the filter body 30 by buoyancy and acts between the flange portion 31 f of the filter body 30 and the receiving portion 13 of the can 10. The power is reduced. However, in the present embodiment, since the filter body 30 is pressed toward the can 10 by the pressing unit 40, the sealed state between the filter body 30 and the receiving portion 13 is stably maintained.

When the molten metal flows into the first bath 11, the molten metal heats the filter body 30, and the filter element 32 increases in size in the Z-axis direction due to thermal expansion. As a result, the pressing member 41 is pressed upward via the contact portion 41p, and the coil spring 45 is compressed. At this time, since the upper limit value of the pressing force is controlled by the predetermined spring constant of the coil spring 45, the pressing force of the filter body 30 by the pressing unit 40 does not become excessive even if the filter element 32 thermally expands. , And restraint cracking of the filter element 32 is suppressed.

Then, as the filtered molten metal staying in the second bathroom 12 increases, the liquid level of the molten metal gradually rises, and eventually reaches the outlet port 15 through the second flow path 15a. The molten metal flowing out of the spout 15 is supplied to the subsequent equipment by appropriate means.

According to the present embodiment as described above, since the filter body 30 is pressed toward the can 10 by the pressing unit 40, it is easy to improve the sealability between the filter 30 and the can 10 A molten metal filter apparatus 100 can be provided.

Further, the can body 10 has a receiving portion 13 for receiving the filter body 30, and the filter body 30 has a circumferential flange portion 31 f in contact with the receiving portion 13. And the receiving part 13 encloses the flow path of the molten metal filtered by the filtration element 32. With such a configuration, the filter body 30 can be stably pressed against the can 10 while appropriately securing the flow path of the filtered molten metal.

Further, since the packing 50 is disposed between the filter body 30 and the receiving portion 13 of the can 10, the sealing performance between the filter body 30 and the receiving portion 13 is enhanced, and the leakage of the molten metal is prevented. be able to.

The can 10 of the present embodiment includes the first bathroom 11 and the second bathroom 12 partitioned by the filter body 30, and the molten metal passes from the first bathroom 11 through the filter body 30 to the second bathroom 12. Flow. For this reason, both the molten metal to be filtered and the filtered molten metal can be retained in the can 10, and continuous filtration of the molten metal can be stably performed.

Since the pressing member 41 of the pressing unit 40 presses the filter body 30 in the first bathroom 11, it is necessary for sealing the filter body 30 and the can 10 even if buoyancy by the molten metal acts on the filter body 30. Since sufficient pressing force is provided, reliable sealing can be ensured.

Furthermore, the can 10 is formed with an opening 12a which is an inlet of the second bathroom 12, and the filter body 30 is disposed so as to cover the opening 12a. For this reason, the filtered molten metal can be smoothly introduced into the second bathroom 12.

Further, the lid 20 has a through hole 20 a, and the pressing member 41 of the pressing unit 40 has a rod-like body portion 41 r penetrating the through hole 20 a of the lid 20. Therefore, in a state where the opening 10a of the can 10 is covered by the lid 20, the pressing member 41 can be easily operated from the outside. In addition, the installation of the pressing unit 40 on the lid 20 does not have a particularly complicated structure, so there is no need to thicken the lid 20, and the mounting and removal of the pressing unit 40 is easy.

The pressing unit 40 has a coil spring 45 as pressing force control means for controlling the pressing force of the pressing member 41 against the filter body 30, and presses the pressing member 41 toward the can 10 through the coil spring 45. For this reason, since the function of applying the pressing force necessary for fixing the filter body 30 and the function of preventing an excessive force from acting on the filter body 30 are suitably provided by a simple configuration, the filtration is performed. Even if the filter body 30 thermally expands or repeats cooling contraction with the operation or cessation of the device 100, restraint cracking of the filter body 30 due to overload of pressing can be avoided, and within a certain range Since pressing force can be applied to the filter body 30, the sealability between the filter body 30 and the receiving portion 13 can be sufficiently maintained.

In addition, since the pressing member 41 has the contact portion 41p at a portion facing the filter body 30, the pressing force by the pressing member 41 is dispersed in a certain area and acts on the filter body 30, so the pressing member Damage to the filter body 30 can be more reliably avoided by 41. This can ensure the long-term reliability of the filter body 30.

The filter body 30 includes a bottomed cylindrical filtration element 32 which extends in the Z-axis direction and whose upper end is a closed end 32c and whose lower end is an open end 32f. Therefore, the area of an orthographic projection image in which the filter body 30 is projected from the Z-axis direction onto the XY plane can be reduced as compared with a filter body in which the filter element 32 is disposed to extend in the horizontal direction. . For this reason, the molten metal filter 100 which can be installed also in a narrower installation space can be provided.

Next, a modification of the above embodiment will be described with reference to FIG. 7 is a schematic cross-sectional view of the molten metal filter 200 according to the modification of FIG. 1, and shows a cross-section at the same position as the VV cross-sectional view (FIG. 5) of FIG.

As shown in FIG. 7, the molten metal filtration device 200 is provided with a fixture 260 that fixes the lid 20 and the can 210. In order to enable fixation by the fixing tool 260, the can body 210 is provided with a pair of locking projections 215 on the outer surfaces of the two wall portions parallel to the XZ plane. The locking projections 215 are projections projecting outward from the respective walls, and may be fixed to the wall of the can 210 by a suitable fixing member, or are integrally formed with the walls It may be done.

As shown in FIG. 7, the fixing tool 260 includes an upper locking portion 261 locked to the upper surface of the lid 20, a lower locking portion 262 locked to the lower surface of the locking convex portion 215, and an upper locking portion And a connecting portion 264 connecting the lower locking portion 262 and the lower locking portion 262. The connection portion 264 is illustrated in FIG. 7 in parallel to the Z axis, but is not limited to such a shape, and may be configured to have, for example, a curved portion. Further, a screw hole is formed through the lower locking portion 262 in the Z-axis direction, and a bolt 263 is screwed into the screw hole. The separation distance between the upper locking portion 261 and the lower locking portion 262 excluding the bolt 263 is slightly larger than the distance from the upper surface of the lid 20 to the lower surface of the locking convex portion 215. On the other hand, the bolt 263 relative to the lower locking portion 262 until the distance between the tip end and the upper locking portion 261 is smaller than the distance from the upper surface of the lid 20 to the lower surface of the locking convex portion 215. It is possible to be screwed. The other configuration is the same as that of the above-described embodiment shown in FIGS. 1 to 2 and 4 to 6, and therefore, in FIG. 7, the same components as in FIGS. 1 to 2 and 4 to 6 are provided. Are given the same reference numerals, and the detailed description thereof is omitted.

Next, the operation of the molten metal filter 200 according to the present modification will be described. First, prior to filtering the molten metal, the opening 10a of the can 210 is covered with the lid 20 in the same manner as the embodiment described above. Then, the lid 20 is fixed to the can 210 using the pair of fixing tools 260 as follows. That is, each bolt 263 is loosened as necessary, and the distance between the tip of the bolt (upper end in FIG. 7) and the upper locking portion 261 is the distance from the upper surface of the lid 20 to the lower surface of the locking convex portion 215 Be made bigger than. Then, the pair of fasteners 260 is assembled to the lid 20 and the can 210 such that the fasteners 260 sandwich the lid 20 and the locking convex portion 215 of the can 210. In this state, each bolt 263 is screwed into the lower locking portion 262 and advanced in the Z-axis positive direction. This screwing is continued until the tip end of the bolt 263 abuts on the lower surface of the locking convex portion 215 of the can 210 and the bolt 263 is tightened with a predetermined torque. In order to stably fix the lid 20 to the can 210, it is preferable that the torque for fastening the bolt 263 is the same in both the fixtures 260.

Then, in the same manner as the embodiment described above, the filter unit 30 is pressed against the can 210 by the pressing unit 40. At this time, even when a pressing force exceeding the gravity acting on the lid 20 acts on the filter 30, the lid 20 is fixed to the can 210, so the reaction of the pressing causes the lid 20 to become a can Unwanted floating from 210 is prevented. Thereafter, the molten metal is filtered. Since the process of this filtration is the same as that of the embodiment mentioned above, the detailed explanation is omitted.

According to the molten metal filter 200 according to the present modification, since the lid 20 is fixed to the can 210 by the fixture 260, the lid 20 is lifted from the can 210 by the reaction by the pressing force of the pressing member 41. Is prevented. Therefore, even when the filter body 30 needs to be strongly pressed by the can body 210 by the pressing member 41, stable pressing is possible. In addition, the molten metal filter 200 can exhibit the same operation and effect as the molten metal filter 100 according to the embodiment shown in FIGS. 1 and 2 and 4 to 6.

In addition, various modifications can be considered for the fixing tool 260 described above. For example, instead of the locking convex portion 215 of the can body 210, a recess may be provided in the wall portion of the can body 210, and the lower locking portion 262 of the fixture 260 may be locked to this concave portion. In this case, the upper locking portion 261 is provided with a screw groove in which the bolt 263 and the bolt are screwed. Alternatively, the lid 20 and the can 10 may be directly fixed by bolts.

Next, FIG. 8 is a schematic cross-sectional view showing a molten metal filtering device 101 according to a further modification of FIG. As shown in FIG. 8, in the molten metal filtering device 101, the direction of the filter body 30 is upside down from the embodiment shown in FIGS. 1 and 2 and 4 to 6. That is, in the present modification, the filter body 30 is installed in the can 10 with the open end 32 f of the filter element 32 positioned upward and the closed end 32 c positioned downward. Therefore, in this modification, the molten metal passes through the bottomed cylindrical filter element 32 while being filtered from the inside to the outside. For this reason, the receiving portion 13 of the can 10 is configured to surround the flow path of the molten metal to be filtered. The pressing member 41 of the pressing unit 40 of this modification presses the filter body 30 from the side of the open end 32 f of the filter element 32 to the receiving portion 13 of the can 10 in the first bathroom 11. For this reason, although not shown, transmission holes through which molten metal can pass are formed at positions corresponding to the open portions of the contact portions 41p so as not to close the open portions of the open ends 32f. The other configuration is substantially the same as that of the embodiment shown in FIGS. 1 and 2 and 4 to 6. Therefore, in FIG. 8, the same components as those in the embodiment shown in FIGS. 1 to 2 and 4 to 6 are denoted by the same reference numerals, and the detailed description thereof is omitted.

Also in this case, the area of the orthographic projection image obtained by projecting the filter body from the Z-axis direction to the XY plane can be reduced as compared with the filter body in which the filter element 32 is horizontally aligned, so a narrower installation It is possible to provide a molten metal filter 101 that can be installed in a space. Furthermore, in addition to this, according to the molten metal filter 101 according to the present modification, substantially the same operation and effect as the molten metal filter 100 according to the embodiment shown in FIGS. 1 and 2 and 4 to 6. Can be achieved. Of course, the aspect that the upper and lower sides of the filter body 30 are reversed is also employable in the modification shown in FIG. Also in this case, the same operation and effect as the modification shown in FIG. 7 can be achieved.

Although the single pressing unit 40 is provided on the lid 20 in the above embodiment and each modification, the present invention is not limited to such an example. That is, in another embodiment, it is also possible to provide a plurality of pressing units 40 on the lid 20. In this case, the through holes 20a through which the pressing member 41 can pass may be formed in the lid 20 by the number of the pressing units 40, and the pressing units 40 may be installed in each through hole 20a. Each pressing unit 40 may be the same as the pressing unit 40 employed in the embodiment shown in FIGS. 1 and 2 and 4 to 6. According to such a configuration, it is possible to further disperse the load acting on the filter element 32 of the filter body 30, so that the risk of the filter element 32 being damaged by the pressing force by the pressing unit 40 can be further reduced.

Preferably, the plurality of pressing units 40 are arranged symmetrically with respect to the origin O as viewed in the Z-axis direction. According to such an arrangement, since the pressing force by the plurality of pressing units 40 acts symmetrically with respect to the center of gravity (the origin O) of the filter body 30, the flange portion 31f of the filter body 30 receives the receiving portion 13 of the can 10. The pressing force is made uniform. As a result, the force acting on the packing 50 is also made uniform, and the space between the flange portion 31 f and the receiving portion 13 can be sealed with a uniform force.

In the above description, an example in which the coil spring 45 is adopted as the pressing force control means has been described. However, as already described, a hydraulic cylinder, an air cylinder or the like may be adopted instead of the coil spring 45. In this case, the pressing force of the pressing member 41 against the filter body 30 can be kept constant by maintaining the hydraulic pressure or the pneumatic pressure at a predetermined value. Furthermore, instead of using the handle 46 and the bolt to generate the axial force, the axial force may be generated by a hydraulic cylinder, an air cylinder or the like. In this case, the hydraulic cylinder, the air cylinder, etc. have both the function of axial force generating means for generating an axial force and the function of pressing force control means for controlling the pressing force with which the pressing member 41 presses the filter body 30. It will be. Also in these cases, since the function of applying the pressing force necessary for fixing the filter body 30 and the function of preventing an excessive force from acting on the filter body 30 can be suitably provided, the filter element 32 can be provided. Restraint cracking due to the thermal expansion of the

Also, in the above description, an example is adopted in which the axial direction of the filtering element 32 is aligned parallel to the Z axis. However, the present invention is not limited to the above example, and the axial direction of the filtering element 32 may be disposed so as to form an acute angle with the Z axis, that is, the axial direction intersects the horizontal plane. Also in this case, the area of the orthographic projection image in which the filter body is projected onto the horizontal surface from above can be reduced compared to the filter body in which the filter element 32 is horizontally aligned, so installation in a narrower installation space A possible molten metal filtration device can be provided.

Claims (16)

1. A can having an opening,
   A lid covering the opening of the can;
   A filter body provided in the can for filtering molten metal;
   A molten metal filtering device comprising: a pressing member capable of pressing the filter body toward the can by moving relative to the lid; and a pressing unit installed on the lid; .
2. The can body has a receiving portion for receiving the filter body,
   The molten metal filtering device according to claim 1, wherein the filter body presses the receiving portion of the can body by being pressed by the pressing member of the pressing unit.
3. The filter body includes a circumferential flange portion abutting on the receiving portion, and a filtration element supported from the periphery by the flange portion,
   The molten metal filter device according to claim 2, wherein the receiving portion surrounds a flow path of the molten metal filtered by the filtering element, or surrounds a flow path of the molten metal filtered by the filtering element.
4. The molten metal filtering device according to claim 2, further comprising a packing disposed between the filter body and the receiving portion of the can body.
5. The can body includes a first bathroom and a second bathroom partitioned by the filter body,
   The molten metal filter device according to any one of claims 1 to 4, wherein the molten metal flows from the first bathroom through the filter body to the second bathroom.
6. The molten metal filtering device according to claim 5, wherein the pressing member of the pressing unit presses the filter body in the first bathroom.
7. The can body is formed with an opening serving as an inlet of the second bathroom,
   The said molten metal filter apparatus of Claim 5 or 6 arrange | positioned so that the said opening may be covered.
8. The lid has a through hole,
   The molten metal filtering device according to any one of claims 1 to 7, wherein the pressing member of the pressing unit has a rod-like portion penetrating the through hole of the lid.
9. The pressing unit has pressing force control means for controlling the pressing force of the pressing member against the filter body, and presses the pressing member toward the can through the pressing force control means. The molten metal filter device according to any one of to 8.
10. The molten metal filter according to claim 9, wherein the pressing force control means is a coil spring.
11. The molten metal filter apparatus according to any one of claims 1 to 10, further comprising a fixing device for fixing the lid and the can.
12. The molten metal filter device according to any one of claims 1 to 11, wherein the pressing member has a contact portion at a portion facing the filter body.
13. The molten metal filter according to claim 12, wherein the contact portion is a plate-like member.
14. The filter body includes a bottomed cylindrical filtration element with one end closed and the other open.
    The molten metal filter device according to any one of claims 1 to 13, wherein an axial direction of the cylindrical filter element intersects with a horizontal surface.
15. The molten metal filter according to claim 14, wherein the filtering element is positioned such that the one end is higher than the other end.
16. The molten metal filter according to claim 14, wherein the filtering element has the other end located lower than the one end.

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