TWI450777B - Metallurgic impact pad - Google Patents

Description

Metallurgical impact pad

The present invention relates to an impact pad for metallurgy. In particular, the present invention relates to a metallurgical impact pad for use in a feed tank, but is not limited thereto.

The impact pad is a general term for a corrosion resistant material pad, which is generally positioned on a bottom plate of a feed tank for receiving a molten metal input stream poured into the feed tank from a die. It helps to minimize the wear of the feed tank itself, and it is also possible to improve the flow characteristics of the molten metal passing through the feed tank and into a mold.

U.S. Patent No. 5,169,591 discloses an impact pad for a feed tank for use in continuous steel casting. The impact pad includes a base, a circumferential top surface, and a discontinuous side wall extending between the base and the circumferential top surface, the side wall having a slit inner side surface that can be formed by a curve.

U.S. Patent No. 5,358,551 discloses an impact pad comprising a base, a side wall extending around the base, the side wall having an inner side surface, and the surface having a portion that extends inwardly and upwardly and is concave.

In view of the above two types and others, the impact pad type is designed to reduce the turbulence in the feed tank, minimize slag inclusion, prevent the melt of the feed tank from collapsing and re-oxidize the molten metal, and ensure that the feed tank has A suitable metal flow path is therefore an object of the present invention to provide an improved impact pad.

According to a first aspect of the present invention, an impact pad is provided, which is resistant to gas a molten metal-contacted refractory material comprising a substrate, in use as an impact surface of a molten metal, and a sidewall extending generally upwardly from the substrate, the sidewall being terminated above the substrate during use An upper surface, such that the substrate and the sidewall define a reservoir for receiving the molten metal, wherein the sidewall includes at least one channel, the at least one channel having a plurality of first and second ends, The first end is closer to the substrate than the second end, wherein the substrate intersects the sidewall, the at least one channel is open at the second end, or tapered to make the at least one channel There is zero depth at its second end.

The term "reservoir" as used herein, in its ordinary sense, means a configuration that can include at least a portion of the molten metal received therein. Specifically, the sidewall does not have to be continuous or completely surrounding the substrate.

It should be understood that at least one channel referred to therein may be formed by cutting into one of the grooves in the side wall, or may be formed indirectly, for example, by spacing one of the side walls to be spaced apart from each other by a ridge or other protrusion. Indirectly formed.

In a first series of embodiments, the first and second ends of the at least one channel are vertically aligned in a plane of the sidewall. In a second series of embodiments, the ends are vertically offset in the plane of the sidewall.

The side wall itself can be inclined relative to the base. In some embodiments, the angle of the sidewall to the substrate is from 75° to 115°, and optimally from about 85° to 95°.

The side wall can have a planar, convex, or concave inner side surface.

The shape of the at least one channel is not particularly limited and may be linear, Angle or curve, or a combination thereof. Preferably, the channel is linear, and in this case, the so-called vertical channel (the end is vertically aligned) with respect to its configuration in the plane of the sidewall (ie, if the sidewall is relative to the substrate If tilted, the channel in the sidewall can still be described as vertical). Similarly, in the case of a linear channel, the description of the tilt (end vertical offset) is independent of the tilt of the side wall itself. Preferably, the channel is inclined at an angle of from 85 to 45, and more preferably about 70, relative to the substrate.

The at least one channel can have a fixed depth in the sidewall, and in this case the channel will be open at the second end. Alternatively, the depth of the at least one channel may be increased, decreased, or otherwise varied between its first and second ends. The depth may vary gradually, or discontinuously, ie stepwise.

The at least one channel may have a fixed, increasing, decreasing, or other varying width between its first and second ends. As described above, the width may vary gradually, or discontinuously, i.e., stepwise. Preferably, a discontinuous channel width or depth variation helps to create a "dead zone" in which undesirable inclusions will readily deposit in the zone, thereby preventing it from continuing into the mold.

The at least one channel can have a square, triangular, curved, or other polygonal cross section. The profile of the at least one channel may be fixed or may vary along its length, such as from a semicircle near the first end to a triangle near the second end. Varying the profile of the at least one channel results in better boundary flow condition changes.

The sidewall may be annular (i.e., continuously extending around the perimeter of the substrate). Alternatively, the sidewall may extend around a portion of the perimeter of the substrate. Two or more side walls may be provided, each extending around a portion of the periphery of the substrate, in which case each of the side walls is preferably provided with at least one channel.

The or each of the side walls can have any combination of one or more straight or curved portions away from or along the substrate. In a specific embodiment, although it is understood that the height and/or shape of the side wall may vary along its length, the or each of the side walls still has a fixed height and a fixed profile (ie, thickness). . In the case of a non-linear (or non-uniform) sidewall, the "plane of the sidewall" is determined at the point of relationship on the sidewall (for example, for a curved sidewall, the sidewall plane at any given point on the sidewall is tied to The point is tangent to the side wall).

The substrate is generally planar (although it may be provided with corrugations, channels, or protrusions) and the impact pad will be designed such that the impact surface is seated horizontally in the feed slot and perpendicular to the metal flow. However, specific embodiments are possible in which the substrate is concave, convex, wavy, pointed, or otherwise contoured. In these cases, the inclination of the impact pad relative to the substrate is understood to be relative to the horizontal plane when the impact pad is in the position of use. Also, when the substrate includes features at different heights relative to the horizontal position, the so-called "above the substrate" is about the highest feature on the substrate.

The shape around the substrate is not limited and may be, for example, a polygon (for example, a rectangle, a square, a trapezoid, etc.), an ellipse, or a circle.

In a specific embodiment, the impact pad is substantially in the form of a box, having a rectangular base with a continuous side wall, wherein the side wall has Four linear sidewall portions, each of the sidewall portions extending vertically upward from the periphery of the substrate and connected to each of the adjacent sidewalls at right angles.

A generally inwardly facing lip may be provided at an upper surface of the or each of the side wall portions. The lip may be substantially parallel to the base or may extend in an inward and upward direction, or an inward and downward direction.

In addition to the at least one channel, the or each of the side wall portions may additionally include a plurality of slots or holes therethrough.

The first end of the at least one channel can be located at the intersection of the substrate and the sidewall. Alternatively, the first end of the at least one channel can be spaced from the substrate. In the latter case, the spacing may be 50% less, 40% less, 25% less, or even at least 10% less than the sidewall height at the point of the relationship location. In any case, the second end of the channel can be open. Alternatively, the at least one channel may be tapered at least in a region toward the second end such that the depth of the at least one channel drops to zero at the second end.

The second end of the at least one channel may extend to an upper surface of the sidewall. Alternatively, the second end of the at least one channel may be spaced from the upper surface of the sidewall. In the latter case, the spacing may be 50% less, 40% less, 25% less, or even at least 10% less than the sidewall height at the point of the relationship location.

In some embodiments, a plurality of channels can be provided. Each channel can be equidistant from each adjacent channel. The spacing between the channels can be, for example, 0.5 to 5 times the width of the channels, 0.75 to 3 times the width of the channels, or even about 1 to 2 times the width of the channels. Alternatively, the spacing between the adjacent channels can vary. In this way, the flow can be left and right by providing a channel that is more concentrated in another interval than in another interval. When the channels are linear, they may be parallel, vertical or inclined. In a specific embodiment, the channels may be arranged in a fan configuration such that the first ends thereof are closely packed with each other and the second ends are more separated.

In a particular series of embodiments, the or each of the side walls (or side wall portions) has at least one pair of linearly-inclined channels that gradually converge toward (but not necessarily coincide with) the second end thereof. When there are more than one pair of such channels, each pair can be placed adjacent to the next one, and in this case, each channel will be in an opposite direction to each adjacent channel (ie, one by one) Zigzag) tilt. Alternatively, the channels may be gradually separated toward their second ends.

In a related series of embodiments, the pairs of channels may be nested with each other, i.e., the channels in each pair will become gradually separated.

A second aspect of the present invention provides a feed tank for accommodating a volume of molten metal, the feed tank having a bottom plate and a plurality of side walls surrounding an impact and discharge area, the impact pad of the present invention is The bottom plate in the impact region of the feed tank.

The impact pad can be integrated with the feed slot.

Please refer to FIGS. 1A and 1B, which illustrate a prior art feed slot impact pad 10 referred to as an "open box." It is incorporated in this description for comparison purposes only. The impact pad 10 includes a square planar substrate 12 (i.e., an impact surface) and is attached with a continuous sidewall formed by four vertical upstanding sidewall portions 14 disposed about the periphery of the substrate 12. Each of the side wall portions 14 is in a planar shape and has a flat upper surface 16 that is parallel to one of the substrates 12. Each of the side wall portions 14 has an equal height and is substantially smaller than its length. then, The impact pad 10 can constitute a relatively shallow open top case.

Example 1

2A and 2B (Example 1) show an impact pad 20 in accordance with a first embodiment of the present invention. The shape of the impact pad 20 is substantially the same as that of the open box impact pad 10 described above with respect to Figures 1A and 1B, and thus the same reference numerals will be used for the same elements. Thus, the impact pad 20 includes a square base 12 and is attached with four vertical side wall portions 14, as described above. However, the impact pad 20 additionally includes a plurality of linear, vertical channels 22 formed in the inner surface of each of the side wall portions 14. Each of the channels 22 has a first end 24 disposed adjacent to the substrate 12 and a second end 26 disposed at the upper surface 16 of the sidewall portion 14. Each channel 22 has a fixed depth from its first end 24 to its second end 26 and has a rectangular cross section. Thus, each channel 22 is open at its second end 26, i.e., the rectangular section of channel 22 will extend all the way to upper surface 16. Each channel 22 is spaced from the next one by a width of one channel 22. It is understood that a similar configuration has been achieved by applying a plurality of cube spacers to the inner wall to define the channel 22 therebetween.

Example 2

The impact pad 40 according to the second embodiment of the present invention is shown in FIGS. 3A and 3B (Example 2). The configuration of the impact pad 40 is substantially the same as that of the impact pad 20 described above with respect to Figures 2A and 2B, and thus the same reference numerals will be used for the same elements. The main difference between the second embodiment and the first embodiment is that each of the plurality of channels 42 is inclined in the plane of each of the side wall portions 14 (i.e., the first end of each of the channels 42) 44 is vertically offset relative to the second end 46. In this particular embodiment, the second end 46 of each channel 42 is vertically offset clockwise when viewed from above the center of the impact pad 40. Each channel 42 is linear but has a generally U-shaped cross section. With respect to the specific embodiments of FIGS. 2A and 2B, each of the first ends 44 is disposed adjacent to the substrate 12, and each of the second ends 46 is disposed at the upper surface 16 of the sidewall portion 14.

Examples 3 and 4

A third embodiment of the impact pad 50 in accordance with the present invention is shown in Figures 4A and 4B (Example 3). The configuration of the impact pad 50 is substantially the same as that of the impact pad 40 described above with respect to Figures 3A and 3B, and thus the same reference numerals will be used for the same elements. The difference between the third embodiment and the second embodiment is that each of the inclined channels 42 is spaced apart from the substrate 12 (ie, each of the first ends 44 is disposed on a portion of the sidewall portion 14 from the substrate 12). the above). Thus, a port 51 is provided in the side wall portion 14 to establish a gap 52 between the substrate 12 and the first end 44 of the channel 42. In this particular embodiment (Example 3), the gap 52 will extend approximately 30% of the height of the sidewall portion 14. In a fourth example (not shown), the impact pad according to the third embodiment has a gap 52 which is half of the example 3 (i.e., 15% of the height of the side wall portion 14).

Example 5

A fourth embodiment of the impact pad 60 in accordance with the present invention is shown in Figures 5A and 5B (Example 5). The configuration of the impact pad 60 is substantially the same as that of the impact pad 40 described above with respect to Figures 3A and 3B, and thus the same reference numerals will be used for the same elements. This fourth embodiment The main difference from the second embodiment is that the inner surface of the side wall portion 14 is wrinkled (i.e., has a sinusoidal cross section) so that the channel 62 is no longer formed in a planar side wall, but is defined by wrinkles. Channel 62. As with the specific embodiments of FIGS. 3A and 3B, each of the channels 62 has a first end 64 disposed adjacent the substrate 12 and a second end 66 disposed at the upper surface 16 of the sidewall portion 14. A further difference is that the second end 66 of each channel 62 is counterclockwise offset in the vertical direction when viewed from above the center of the impact pad 60.

Examples 6 and 7

6A and 6B (Example 6) show an impact pad 70 according to a fifth embodiment of the present invention. The configuration of the impact pad 70 is substantially the same as that of the impact pad 60 described above with respect to FIGS. 5A and 5B, and thus the same elements will be used for the same elements. The fifth embodiment differs from the fourth embodiment in that a port 71 is provided in the side wall portion 14 to establish a gap 72 between the substrate 12 and the first end 64 of the channel 62. In this embodiment (Example 6), the gap 52 extends approximately 30% of the height of the sidewall portion 14, as in Example 3. In a seventh example (not shown), the impact pad according to the fifth embodiment has a gap 72 which is half of the example 6 (i.e., 15%).

Example 8

A sixth embodiment of the impact pad 80 in accordance with the present invention is shown in Figures 7A and 7B (Example 8). The configuration of the impact pad 80 is substantially similar to that of the impact pad 50 described above with respect to Figures 4A and 4B, and thus the same elements will be used with the same elements. This sixth embodiment The main difference from the third embodiment is that a base 82 is circular and a side wall 84 is a circular ring. In addition, the base 82 is in the shape of a spire having a raised central portion 86 with a plurality of ramp sides 88 attached thereto. In the present embodiment, the plurality of channels 90 are inclined at an angle of 80 relative to the substrate 82. A gap 52 of about 40% of the height of the side wall 84 is provided between the channel 90 and the substrate 82. The channels 90 are spaced apart from one another by a width of a single channel 90. A variation (not shown) of this embodiment has a planar base 82.

Examples 9 and 10

The impact pad 100 according to the seventh embodiment of the present invention is shown in Figs. 8A and 8B (Example 9). The configuration of the impact pad 100 is substantially the same as that of the impact pad 10 described above with respect to FIGS. 1A and 1B, and thus the same elements will be used for the same elements. As for the impact pads of the first to sixth embodiments described above, the impact pad 100 additionally includes a plurality of linear channels 102 formed in the inner surface of each of the side wall portions 14. However, in the present embodiment, the two opposing side wall portions 14 have a first pair of inclined channels 102 from which a plurality of first ends 104 are located adjacent to the substrate 12 (but spaced apart from the substrate) toward the upper surface 16 thereof. The plurality of second ends 106 are gradually separated. A second pair of inclined progressive separation channels 108 are also provided on the side wall portions 14. A second pair of channels 108 are nested around the first pair of channels 102 to establish two parallel channels that are gradually separated from the centerline on either side of the centerline of each of the side wall portions 14. On the remaining opposite side wall portions 14, two sets of stacked pairs of channels 110 and 112 are provided. However, in the present embodiment, the pair of channels 110, 112 are configured to gradually converge toward a centerline such that each set of channels on each side wall portion 14 can be dispensed The ground gradually converges and separates from the substrate 12 toward the upper surface 16. In a variant (eighth) embodiment (not shown), each side wall portion 14 may comprise only a plurality of pairs of progressively collecting channels (Example 10). In a more variant embodiment (not shown), each side wall portion 14 includes only a plurality of pairs of progressively separated channels. Each channel 102, 108, 110, 112 has a fixed depth from one of its first end 104 to its second end 106 and has a generally U-shaped cross section. As with the specific embodiments of FIGS. 4A and 4B, 6A and 6B, and 7A and 7B, the channels 102, 108, 110, 112 are spaced from the substrate 12. In this particular embodiment (Example 9), a gap 114 of about 30% of the height of the sidewall portion 14 is disposed between the channels 102, 108, 110, 112 and the substrate 12. Also, in the present embodiment, the channels 102, 108, 110, 112 are inclined at an angle of 70 relative to the substrate 12.

Example 11

The impact pad 120 according to the ninth embodiment of the present invention is shown in Figs. 9A and 9B (Example 11). The configuration of the impact pad 120 is substantially similar to that of the impact pad 20 described above with respect to FIGS. 2A and 2B, and thus the same elements will be used for the same elements. The main difference between this ninth embodiment and the first embodiment is that the depth of the channel 122 is increasing from the substrate 12, i.e., the channel 122 is tapered.

Example 12

The impact pad 130 according to the tenth embodiment of the present invention is shown in FIG. 10A and FIG. 10B (Example 12). The configuration of the impact pad 130 is substantially similar to that of the impact pad 20 described above with respect to Figures 2A and 2B, and thus the same elements will be used with the same element symbols. This tenth embodiment The main difference from the first embodiment is that one of the inner surfaces 132 of the side wall portion 14 is inclined toward the center of the substrate 12. The channel 22 has a fixed depth along one of its lengths and is substantially the same as that of FIGS. 2A and 2B, but is provided on the inclined inner surface 132.

Example 13

The impact pad 140 according to the eleventh embodiment of the present invention is shown in FIG. 11A and FIG. 11B (Example 13). The configuration of the impact pad 140 is substantially similar to that of the impact pad 50 described above with respect to Figures 4A and 4B, and thus the same elements will be used with the same elements. The main difference between this eleventh embodiment and the third embodiment is that the depth of the plurality of channels 142 is reduced from the substrate 12.

Example 14

The impact pad 150 according to the twelfth embodiment of the present invention is shown in Fig. 12 (Example 14). The configuration of the impact pad 150 is substantially similar to that of the impact pad 50 described above with respect to Figures 4A and 4B, and thus the same elements will be used with the same elements. The main difference between this twelfth embodiment and the third embodiment is that the depth of the plurality of channels 152 increases from the substrate 12. Moreover, this particular embodiment has an open side end 154 that includes three, rather than four, side wall portions 14.

Example 15

The impact pad 160 according to the thirteenth embodiment of the present invention is shown in Figs. 13A and 13B (Example 15). The configuration of the impact pad 160 is generally similar to that of the impact pad 120 described above with respect to Figures 9A and 9B, and thus the same elements will be used with the same element symbols. This thirteenth specific The main difference between the embodiment and the ninth embodiment is that as the depth of the plurality of channels 162 is increased from the substrate 12, the width thereof is also increased. Thus, each of the side wall portions 14 is provided with fewer channels 162.

Example 16

The impact pad 170 according to the fourteenth embodiment of the present invention is shown in Figs. 14A and 14B (Example 16). The configuration of the impact pad 170 is substantially similar to that of the impact pad 160 described above with respect to Figures 13A and 13B, and thus the same elements will be used with the same element symbols. The main difference between the fourteenth embodiment and the thirteenth embodiment is that a gap 172 of about 30% of the height of the side wall portion 14 is provided between the channel 162 and the substrate 12.

Example 17

An impact pad 180 according to a fifteenth embodiment of the present invention is shown in Fig. 15A and Fig. 15B (Example 17). The configuration of the impact pad 180 is substantially similar to that of the impact pad 160 described above with respect to Figures 13A and 13B, and thus the same elements will be used with the same elements. The main difference between the fifteenth embodiment and the thirteenth embodiment is that the depth and width of the plurality of channels 182 are reduced, rather than increased, from the substrate 12.

Example 18

The impact pad 190 according to the sixteenth embodiment of the present invention is shown in Figs. 16A and 16B (Example 18). The configuration of the impact pad 190 is generally similar to that of the impact pad 180 described above with respect to Figures 15A and 15B, and thus the same elements will be used with the same elements. The main difference between the sixteenth embodiment and the fifteenth embodiment is that a gap 192 of about 30% of the height of the side wall portion 14 is provided between the channel 182 and the substrate 12.

Example 19

The impact pad 200 according to the seventeenth embodiment of the present invention is shown in Fig. 17 (Example 19). The configuration of the impact pad 200 is substantially similar to that of the impact pad 20 described above with respect to Figures 2A and 2B, and thus the same elements will be used with the same element symbols. The main difference between this seventeenth embodiment and the first embodiment is that the two opposite side ends 202 are open, i.e., they include two, rather than four, side wall portions 14.

In all of the above embodiments, the second ends of the channels terminate in the same plane as the upper surface 16 of the side wall portion 14. In a variant embodiment (not shown), the second ends of the channels may terminate below or above the upper surface 16. Where the channel is established by attaching a set of spacers to a substantially planar sidewall portion, the spacers can be positioned to terminate below the upper surface 16 or extend beyond the upper surface 16.

In yet another embodiment (not shown), the depth of the channel can be tapered while reaching zero at its second end. In this case, the second ends of the channels may be located in a plane substantially the same as the upper surface 16 of the side wall portion 14, or a distance below the upper surface 16.

In use, one of the impact pads of any of the above embodiments is placed inside a feed slot (not shown) from which molten metal flows from a die into the feed slot. Thus, the molten metal is first received in the impact pad, and this helps to reduce the wear of the feed cell itself, and can also dissipate the energy of the input stream via the impact with the impact pad substrate and sidewalls. As the flow continues to flow, the molten metal will flow upwardly and beyond the sidewall of the impact pad and along the feed slot to one of the distances generally located away from the impact pad. Drain hole. This will allow undesired inclusions to float to the top of the molten metal pool to improve the quality of the metal exiting the feed tank and entering a mold.

Applicants have discovered that embodiments of the present invention all contribute to the generation of rotation or turbulence in their area when the impact pad is used, which can help trap inclusions and encourage them to be more regular. Floating quickly to the surface of the molten metal pool, and/or this may help dissipate the kinetic energy in the molten metal stream before the molten metal stream runs along the length of the feed tank, thereby also reducing inclusions with the metal The possibility of flowing into the mold. Please note that beyond the area of the impact pad, the metal will be relatively less disturbing.

The first table below shows the results of the water simulation test performed by the Applicant with respect to certain of the above specific embodiments. The "dead" value is a measure of the metal stagnation in the feed tank. It is desirable that the value be lower. The "plug" value is a measure of the amount of metal that moves along the feed slot and does not actually mix. This value is preferably higher. All of these values can be obtained using standard techniques, the details of which can be found in the relevant textbooks.

As can be seen from the first table, all of the embodiments of the present invention have an improved (i.e., lower) "fail" value as compared to prior art open box configurations. Moreover, all of these embodiments have an improved (i.e., higher) "plug flow" value as compared to prior art open box configurations.

As described above, the differences between Examples 3 and 4, 5 and 7 are the extent to which a gap between the first end of the channel of the impact pad under consideration, the intersection with its pedestal and the side wall, or whether there is a gap. From the results of Concrete Example 3, it can be seen that a smaller gap (Example 4) will improve the "failed" value and the "plug flow" value. Furthermore, from the results of Examples 5 and 7, it can be seen that a small gap (Example 7) will improve the "failure" value and has no effect on the "plug flow" value compared to the no gap (Example 5).

It can also be seen from the first table that the person providing the vertical channel (Specific Embodiment 1) has less influence than the inclined channel (Specific Embodiments 3, 4, 5). Also, providing a wide channel (Specific Embodiment 3) narrower channel (Specific Embodiments 4, 5) has a large effect. Further, the configuration of the specific embodiment 8 has a significantly improved performance compared to all other specific embodiments.

By observing the manner in which the dye in the flow is introduced during the water simulation, it is also noted that when using an impact pad according to one embodiment of the present invention, the dye near the impact pad will be used in a prior art. The impact pad is left for a longer period of time. In addition, it is also noted that as the dye begins to travel along the length of the feed trough, it begins to run along the feed trough near the surface of the tank for a longer period of time than would otherwise be the case with the bottom of the tank. This means that the flow is forced upwards more than the previous designer, causing more inclusions to float to the top of the pool.

It can be understood that the depth and size of the impact pad will be based on its use. It depends on the specific configuration of the feeding trough.

Those skilled in the art will appreciate that various modifications may be made to the specific embodiments described above without departing from the scope of the invention. In particular, the features of two or more of the above-described embodiments may be combined into a single embodiment, and one or more of the features of the above-described embodiments may be utilized in prior art impact pads.

10‧‧‧(previous skill feeding slot) impact pad

12‧‧‧(square plane) base square base

14‧‧‧(vertical upright) side wall (part) vertical side wall

16‧‧‧(flat) upper surface

20‧‧‧impact pad

22‧‧‧ (linear, vertical) channel

24‧‧‧ first end

26‧‧‧second end

40‧‧‧impact pad

42‧‧‧Channel

44‧‧‧ first end

46‧‧‧second end

50‧‧‧impact pad

51‧‧‧Incision

52‧‧‧ gap

60‧‧‧impact pad

62‧‧‧Channel

64‧‧‧ first end

66‧‧‧second end

70‧‧‧impact pad

71‧‧‧Incision

72‧‧‧ gap

80‧‧‧impact pad

82‧‧‧ (planar) substrate

84‧‧‧ side wall

86‧‧‧ Uplift Center

88‧‧‧ slope side

90‧‧‧Channel

100‧‧‧impact pad

102‧‧‧ (linear) channel (first pair of tilt) channel

104‧‧‧ first end

106‧‧‧second end

108‧‧‧(second pair of inclined yaw)

110‧‧‧Channel

112‧‧‧Channel

114‧‧‧ gap

120‧‧‧impact pad

122‧‧‧Channel

130‧‧‧impact pad

132‧‧‧(tilted) inner surface

140‧‧‧impact pad

142‧‧‧Channel

150‧‧‧impact pad

152‧‧‧Channel

154‧‧‧Open side

160‧‧‧impact pad

162‧‧‧Channel

170‧‧‧impact pad

172‧‧‧ gap

180‧‧‧impact pad

182‧‧‧Channel

190‧‧‧impact pad

192‧‧‧ gap

200‧‧‧impact pad

202‧‧‧ side

The above is a description of the specific embodiments of the present invention, which are used as an example only, wherein: FIG. 1A and FIG. 1B respectively show a comprehensive and one of the prior art impact pads in an open box configuration. Partial perspective view; FIG. 2A and FIG. 2B respectively show a comprehensive and partial partial perspective view of a first embodiment of a plurality of impact pads facing a positive channel in a vertical direction according to the present invention; FIGS. 3A and 3B respectively A full and partial perspective view of a second embodiment of an impact pad having a plurality of inclined channels in accordance with the present invention; and FIGS. 4A and 4B respectively show a third embodiment of a pad according to the present invention Full and partial partial views similar to the second embodiment (Figs. 3A and 3B), but with channels inclined toward the opposite direction and spaced from the substrate; 5A and 5B are respectively shown according to the present A full and partial perspective view of a fourth embodiment of the impact pad of the present invention, similar to the second embodiment (Figs. 3A and 3B), but having wrinkles in the side wall portion a defined channel; FIGS. 6A and 6B respectively show a full and partial perspective view of a fifth embodiment of an impact pad according to the present invention, which is similar to the fourth embodiment (5A and 5B) Figure), but with a channel spaced from the substrate; Figures 7A and 7B respectively show a full and partial perspective view of a sixth embodiment of an impact pad according to the present invention, having a circular base; 8A Figure 8 and Figure 8B respectively show a full and partial partial perspective view of a seventh embodiment of an impact pad according to the present invention, having a plurality of mutually nested progressive convergence channels in two opposing side wall portions, and a plurality of mutually nested and intersecting off-going channels in the opposite side wall portions; FIGS. 9A and 9B are respectively a full and partial partial perspective view showing a ninth embodiment of the impact pad according to the present invention, which is similar to the first Specific embodiments (Figs. 2A and 2B), but having a plurality of channels that are gradually increasing from the impact surface; FIGS. 10A and 10B are respectively showing a tenth embodiment of the impact pad according to the present invention. a comprehensive and a partial perspective view, Similar to the first embodiment (Figs. 2A and 2B), but having the inner surface of the side wall portion inclined toward the center of the pad; FIGS. 11A and 11B respectively show the eleventh embodiment of the impact pad according to the present invention, respectively. A full and partial perspective view of an example similar to the third embodiment (Figs. 4A and 4B) but having a plurality of channels that are progressively reduced from the impact surface; FIG. 12 shows one of the aspects of the present invention. The twelfth implementation of the impact pad A full perspective view of an example similar to the third embodiment (Figs. 4A and 4B) but having an open side end and a plurality of channels that are progressively increasing from the impact surface; Fig. 13A and Figure 13B shows a full and partial partial perspective view of a thirteenth embodiment of an impact pad according to the present invention, respectively, with a plurality of channels each having an increasing width and depth from the impact surface; Figure 14A and Figure 14B is a full and partial perspective view, respectively, showing a fourteenth embodiment of an impact pad according to the present invention, similar to the thirteenth embodiment (Figs. 13A and 13B), but having a phase with the substrate Channels of intervals; 15A and 15B respectively show a full and partial perspective view of a fifteenth embodiment of an impact pad according to the present invention, which is provided with a plurality of channels, each having a self-impact surface Descending width and depth; FIGS. 16A and 16B are respectively a full and partial perspective view showing a sixteenth embodiment of an impact pad according to the present invention, which is similar to the fifteenth embodiment (Fig. 15A and 15B) but with a substrate-spaced channel; and Figure 17 shows a full perspective view of a seventeenth embodiment of an impact pad in accordance with the present invention, with two opposing open side ends and a plurality of vertical channels therein Opposite side wall.

12‧‧‧(square plane) base square base

14‧‧‧(vertical upright) side wall (part) vertical side wall

16‧‧‧(flat) upper surface

20‧‧‧impact pad

22‧‧‧ (linear, vertical) channel

24‧‧‧ first end

26‧‧‧second end

Claims (10)

An impact pad (20) formed of a refractory material resistant to contact with a molten metal, comprising a substrate (12), in use as an impact surface of a molten metal, and a sidewall (14), generally The substrate extends upwardly, and the sidewall (14) terminates at an upper surface (16) above the substrate (12) when used, such that the substrate (12) and the sidewall (14) define a receiving molten metal a receptacle, wherein the sidewall (14) includes at least one channel (22) having a plurality of first and second ends (24, 26), the first end ( 24) relative to the second end (26) being closer to the intersection of the substrate (12) and the sidewall (14), the at least one channel (22) being open at the end of the second end (26), Or tapered such that the at least one channel (22) has a zero depth at its second end (26) and the second end (26) terminates in the same plane as the upper surface (16). The impact pad (20) of claim 1, wherein the first and second ends (24, 26) of the at least one channel (22) are vertically aligned in the plane of the side wall (14) . The impact pad (20) of claim 1, wherein the first and second ends (24, 26) of the at least one channel (22) are vertically offset in a plane of the side wall (14) shift. The impact pad (20) of claim 1 wherein the side wall (14) is inclined relative to the base (12). Such as the impact pad (20) of claim 1 of the patent scope, wherein the at least one The channel (22) has a depth that increases, decreases, or otherwise varies between the first and second ends (24, 26). The impact pad (20) of claim 1, wherein the at least one channel (22) has a width that increases, decreases, or otherwise varies between the first and second ends (24, 26). The impact pad (20) of claim 1 wherein the at least one channel (22) has a profile that varies between the first and second ends (24, 26). The impact pad (20) of claim 1, wherein the first end (24) of the at least one channel (22) is spaced from the substrate (12). The impact pad (20) of any one of claims 1 or 3, wherein at least one pair of channels (22) are disposed, and wherein the pair is oriented toward the second end thereof (26) Convergence or separation. A feed tank for accommodating a volume of molten metal, the feed tank having a bottom plate, a plurality of side walls wound around an impact region, and a draining device, such as the impact pad (20) of any of the preceding claims It is disposed on the floor of the feed tank in the impact region.